# Biyologlar listesi
 - YÖNLENDİRME 
Bu madde kayda değer biyologların listesidir. Zoologlar, botanikçiler, ornitologlar, malakologlar, doğa bilimciler ve diğer uzmanlıkları da içermektedir. 


## A.
 - Humayun Abdulali (1914–2001), Hint ornitolog
 - Arthur Loveridge (1891–1980) İngiliz biyolog ve herpetolog
 - Aziz Ab'Sáber (1924–2012), Brezilyalı coğrafyacı, jeolog ve çevre bilimci
 - Erik Acharius (1757–1819), İsveçli botanikçi
 - Johann Friedrich Adam (18. yy–1806), Rus botanikçi
 - Arthur Adams (1820–1878), İngiliz hekim ve doğa bilimci
 - Henry Adams (1813–1877), İngiliz doğa bilimci ve konkolog
 - William Aiton (1731–1793), İskoç botanikçi (botanikteki kısaltma: Aiton)
 - Michel Adanson (1727–1806), Fransız doğa bilimci (botanikteki kısaltma: Adans.)
 - Edgar Douglas Adrian (1889–1977), Britanyalı elektrofizyolog, nöron araştırmaları için 1932 Nobel Fizyoloji ve Tıp Ödülü ile ödüllendirilmiştir
 - Adam Afzelius (1750–1837), İsveçli botanikçi
 - Carl Adolph Agardh (1785–1859), İsveçli botanikçi
 - Jacob Georg Agardh (1813–1901), İsveçli botanikçi
 - Louis Agassiz (1807–1873), İsviçreli zoolog
 - Alexander Agassiz (1835–1910), Amerikalı zoolog, Louis Agassiz'in oğlu
 - Nikolaus Ager (1568–1634), Fransız botanikçi
 - Pedro Alberch i Vié (1954–1998), İspanyol doğa bilimci
 - Bruce Alberts (1938), Amerikalı biyokimyager, ABD Bilimler Akademisi'nin eski başkanı
 - Boyd Alexander (1873–1910), İngiliz ornitolog
 - Horace Alexander (1889–1989), İngiliz ornitolog
 - Richard D. Alexander (1930), Amerikalı evrimsel biyolog
 - Wilfred Backhouse Alexander (1885–1965), İngiliz ornitolog
 - Alfred William Alcock (1859–1933), Britanyalı doğa bilimci
 - Salim Ali (1896–1987), Hint ornitolog
 - Frédéric-Louis Allamand (1736– after1803), İsviçreli botanikçi (botanikteki kısaltma: F.Allam.)
 - Warder Clyde Allee (1885–1955), Amerikalı zoolog ve çevre bilimci, Allee etkisini tanımlamıştır
 - Joel Asaph Allen (1838–1921), Amerikalı  kuşlar, memeliler
 - George James Allman (1812–1898), Britanyalı doğa bilimci
 - Prospero Alpini (1553–1617), İtalyan botanikçi
 - Sidney Altman (1939), Kanadalı doğumlu moleküler biyolog, RNA üzerine çalışması için 1989 Nobel Kimya Ödülü ile ödüllendirilmiştir
 - Bruce Ames (1928), Amerikalı biyokimyager, Ames testini icat etmiştir
 - José Alberto de Oliveira Anchieta (1832–1897), Portekizli doğa bilimci
 - George Fransız Angas (1822–1886), İngiliz kâşif, doğa bilimci, konkolog ve ressam
 - Jakob Johan Adolf Appellöf (1857–1921), İsveçli deniz zoologu
 - Aristoteles (MÖ 384–MÖ 322), Yunan filozof
 - Peter Artedi (1705–1735), İsveçli doğa bilimci
 - Gilbert Ashwell (1916–2014), Amerikalı biyokimyager, hücre reseptörü çalışmalarında öncü
 - Jean Baptiste Audebert (1759–1800), Fransız doğa bilimci
 - Jean Victoire Audouin (1797–1841), Fransız zoolog
 - John James Audubon (1786–1851), Amerikalı ornitolog
 - Charlotte Auerbach (1899–1994), Alman genetikçi, mutagenez disiplininin kurucusu
 - Richard Axel (1946), Nobel ödüllü fizyolog
 - Julius Axelrod (1912–2004), Amerikalı biyokimyager, katekolamin nörotransmitter araştırmaları için 1970 Nobel Fizyoloji ve Tıp Ödülü ile ödüllendirilmiştir
 - William Orville Ayres (1817–1887), Amerikalı hekim ve balık bilimci
 - Félix de Azara (1746–1811), İspanyol doğa bilimci


## B.
### Ba-Bi.
 - Churchill Babington (1831–1881), Britanyalı arkeolog ve konçolojist (yumuşakçaların kabuklarını araştıran bilim dalı)
 - John Bachman (1790–1874), Amerikalı doğabilimci
 - Curt Backeberg (1894–1966), Alman botanikçi (Botanik kısaltması: Backeb.)
 - Karl Ernst von Baer (1792–1876), embriyolog
 - Liberty Hyde Bailey (1858–1954), Amerikalı botanikçi (Botanik kısaltması: L.H.Bailey)
 - Spencer Fullerton Baird (1823–1887), Kuşlar ve memeliler
 - John Hutton Balfour (1808–1884), İskoçyalı botanikçi (Botanik kısaltması: Balf.)
 - David Baltimore (1938), Fizyoloji ve Tıp Alanında 1975 Nobel Ödülü
 - Joseph Banks (1743–1820), biyolog, botanikçi (Botanik kısaltması: Banks)
 - Robert Bárány (1876–1936), Avusturyalı fizisyen, vestibüler sistem (kulak ve duyma sistemi) üzerine yaptığı araştırmalarla Fizyoloji ve Tıp Alanında 1914 Nobel Ödülü almıştır.
 - Benjamin Smith Barton (1766–1815), Amerikalı botanikçi (Botanik kısaltması: Barton)
 - John Bartram (1699–1777), Amerikalı botanikçi (Botanik kısaltması: Bartram)
 - William Bartram (1739–1823), Amerikalı doğa bilimci (Botanik kısaltması: W.Bartram)
 - Anton de Bary (1831–1888), cerrah, botanikçi, mikrobiyolog
 - Henry Walter Bates (1825–1892), İngiliz doğa bilimci
 - Patrick Bateson (1938), İngiliz biyolog ve yazar, Londra Zooloji Topluluğu başkanı
 - August Johann Georg Karl Batsch (1762–1802), Alman botanikçi, mikolog
 - Nicolas Baudin (1754–1803), Fransız botanikçi
 - Gaspard Bauhin (1560–1624), İsviçreli botanikçi, Linnaeus tarafından kullanılan ikili isimlendirmeyi taksonomiye tanıtmıştır, (Botanik kısaltması: C.Bauhin)
 - Johann Matthäus Bechstein (1757–1822), Alman doğa bilimci (Botanik kısaltması: Bechst.)
 - Rollo Beck (1870–1950), Amerikalı ornitolog
 - Charles William Beebe (1877–1962), Biyolog
 - Martinus Beijerinck (1851–1931), Hollandalı mikrobiyolog ve botanikçi, virüsleri keşfetmiştir
 - Thomas Bell (1792–1880), İngiliz doğa bilimci
 - David Bellamy (1933), İngiliz botanikçi
 - Edward Turner Bennett (1797–1836), İngiliz zoolog
 - George Bentham (1800–1884), İngiliz botanikçi (Botanik kısaltması: Benth.)
 - Robert Bentley (1821–1893), İngiliz botanikçi (Botanik kısaltması: Bentley)
 - Jacques Benveniste (1935–2004), Fransız immunolog
 - Wilson Teixeira Beraldo (1917–1998), Brezilyalı hekim ve fizyolog, bradikinini keşfeden iki kişiden birisidir
 - Hans Berger (1873–1941), Alman nörobilimci, Elektroensefalografiyi bulan kişilerden birisidir
 - Carl Bergmann (1814–1865), Alman anatomici, fizyolog ve biyolog, Bergmann kuralını geliştirmiştir
 - Rudolph Bergh (1824–1909), Danimarkalı hekim ve zoolog
 - Claude Bernard (1813–1878), Fransız fizyolog ve homeostasis konseptinin babası
 - Samuel Stillman Berry (1887–1984), Amerikalı deniz zooloğu
 - Thomas Bewick (1753–1828), İngiliz ornitolog
 - Colin Bibby (1948–2004), İngiliz ornitolog
 - Gabriel Bibron (1806–1848), Fransız zoolog
 - Johannes Abraham Bierens de Haan (1883–1953), Hollandalı biyolog ve etolog
 - Ann Bishop (1899–1990), İngiliz biyolog
 - Biswamoy Biswas (1923–1994), Hint ornitolog


### Bl-Bu.
 - Liz Blackburn (1948), Australian/US Nobel Prize–winning researcher in the field of telomeres and the "telomerase" enzyme
 - John Blackwall (1790–1881), Britanyalı entomolog
 - Henri Marie Ducrotay de Blainville (1777–1850), Fransız zoolog
 - Albert Francis Blakeslee (1874–1954), Amerikalı botanikçi, best known for research on Jimsonweed and the sexuality of fungi
 - Thomas Blakiston (1832–1891), İngiliz doğa bilimci 
 - William Thomas Blanford (1832–1905), İngiliz doğa bilimci 
 - Pieter Bleeker (1819–1878), Hollandalı ichthyologist
 - Günter Blobel (1936), Alman Nobel Prize-winning biyolog who discovered that newly synthesized proteins contain "address tags" which direct them to the proper location within the cell.
 - Steven Block (1952), Amerikalı biophysicist who measured the mechanical properties of single bio-molecules
 - Carl Ludwig Blume (1789–1862), Alman-Hollandalı botanikçi (abbr. in botany: Blume)
 - Johann Friedrich Blumenbach (1752–1840), Alman physiologist and anthropologist
 - Edward Blyth (1810–1873), İngiliz zoolog
 - José Vicente Barbosa du Bocage (1823–1907), Portuguese zoolog
 - Pieter Boddaert (1730–1795 or 1796), doğabilimci
 - Charles Lucien Bonaparte (1803–1857), Fransız doğabilimci
 - James Bond (1900–1989), Amerikalı ornitolog
 - Franco Andrea Bonelli (1784–1830), İtalyan ornitolog
 - August Gustav Heinrich von Bongard (1786–1839), Alman botanikçi
 - Charles Bonnet (1720–1793), Swiss doğabilimci
 - Aimé Bonpland (1773–1858), Fransız botanikçi (abbr. in botany: Bonpl.)
 - Jules Bordet (1870–1961), Belçikalı immunologist and microbiyolog, winner of the 1919 Nobel Prize in Physiology or Medicine for his discovery of the complement system in the immune system
 - Antonina Georgievna Borissova (1903–1970), Rus botanikçi
 - Norman Borlaug (1914), Amerikalı agricultural scientist, humanitarian, Nobel laureate, and the father of the Green Revolution
 - Louis Augustin Guillaume Bosc (1759–1828), Fransız zoolog
 - George Albert Boulenger (1858–1937), Belçikalı zoolog
 - Jules Bourcier (1797–1873), Fransız doğabilimci
 - Johann Friedrich von Brandt (1802–1879), Alman doğabilimci (abbr. in botany: Brandt)
 - Sara Branham Matthews (1888–1962), Amerikalı microbiyolog
 - Christian Ludwig Brehm (1787–1864), Alman ornitolog
 - Alfred Brehm (1829–1884), Alman zoolog
 - Sydney Brenner (1927), Britanyalı molecular biyolog, winner of the 2002 Nobel Prize in Physiology or Medicine
 - Thomas Mayo Brewer (1814–1880), Amerikalı doğabilimci
 - William Brewster (1851–1919), Amerikalı ornitolog
 - Mathurin Jacques Brisson (1723–1806), Fransız zoolog
 - Nathaniel Lord Britton (1859–1934), Amerikalı botanikçi (abbr. in botany: Britton)
 - Thomas D. Brock (1926), Amerikalı biyolog, discoverer of hyperthermophiles
 - Adolphe Théodore Brongniart (1801–1876), Fransız botanikçi (abbr. in botany: Brongn.)
 - Robert Broom (1866–1951), South African paleontologist
 - James H. Brown, Amerikalı ecologist
 - Robert Brown (1773–1858), botanikçi (abbr. in botany: R.Br.)
 - David Bruce (1855–1931), İskoç pathologist and microbiyolog
 - Jean Guillaume Bruguière (1750–1798), Fransız doğabilimci
 - Morten Thrane Brünnich (1737–1827), Danimarkalı zoolog
 - Francis Buchanan-Hamilton (1762–1829), İskoç zoolog and botanikçi
 - Stephen L. Buchmann, co-author of The Forgotten Pollinators
 - Linda B. Buck (1947), Amerikalı physiologist and Nobel prize winner
 - Samuel Botsford Buckley (1809–1884), Amerikalı doğabilimci (abbr. in botany: Buckley)
 - Buffon (1707–1788), Fransız doğabilimci (abbr. in botany: Buffon)
 - William Bullock (1773–1849), İngiliz doğa bilimci 
 - Walter Buller (1838–1906), Yeni Zelandalı doğabilimci
 - James Bulwer (1794–1879), İngiliz doğa bilimci and conchologist
 - Alexander von Bunge (1803–1890), Alman-Rus zoolog
 - Luther Burbank (1849–1926), Amerikalı horticulturalist
 - Hermann Burmeister (1807–1892), Alman zoolog
 - Carlos Bustamante (1951), Amerikalı biophysicist, discovered "molecular tweezers" to manipulate DNA
 - Ernesto Bustamante (1950), Peruvian biochemist, specialist in mitochondria. Currently works on DNA paternity testing


## C.
 - Jean Cabanis (1816–1906), Alman ornitolog
 - George Caley (1770–1829), İngiliz botanikçi
 - Rudolf Jakob Camerarius (1665–1721), Alman botanikçi
 - Frederick Campion Steward (1904–1993), Britanyalı botanikçi
 - A. P. de Candolle (1778–1841), Swiss botanikçi
 - Philip Pearsall Carpenter (1819–1877), conchologist
 - Alexis Carrel (1873–1944), Fransız biyolog and surgeon, winner of the 1912 Nobel Prize in Physiology or Medicine for his work on sutures and organ transplants, advocate of eugenics
 - Elie-Abel Carrière (1818–1896), Fransız botanikçi
 - Clodoveo Carrión Mora (1883–1957), Ecuadorian paleontologist and doğabilimci
 - Sean B. Carroll, Amerikalı evolutionary development biyolog
 - Rachel Carson (1907–1964), biyolog, author of "Silent Spring"
 - George Washington Carver (1860–1943), Amerikalı botanikçi
 - John Cassin (1813–1869), Amerikalı ornitolog
 - Alexandre de Cassini (1781–1832), Fransız botanikçi (abbr. in botany: Cass.)
 - William E. Castle (1867–1962), Amerikalı geneticist
 - Mark Catesby (1683–1749), İngiliz doğa bilimci 
 - Andrea Cesalpino (1519–1603), İtalyan botanikçi
 - Francesco Cetti (1726–1778), İtalyan zoolog
 - Carlos Chagas (1879–1934), Brezilyalı physician
 - Adelbert von Chamisso (1781–1838), Alman botanikçi
 - Simon Chan (1974–2012), Yeni Zelandalı plant biyolog
 - Min Chueh Chang (1908–1991), biyolog
 - Frank Michler Chapman (1864–1945), ornitolog
 - Martha Chase (1927–2003), Amerikalı biyolog, conducted the Hershey-Chase experiment which linked DNA to heredity
 - Thomas Frederic Cheeseman (1846–1923), Yeni Zelandalı botanikçi and doğabilimci.
 - Sergei Chetverikov (1880–1959), Rus population geneticist
 - Charles Chilton (1860–1929), Yeni Zelandalı zoolog
 - Carl Chun (1852–1914), Alman marine biyolog
 - Nathan Cobb (1859–1932), Amerikalı biyolog, considered the founder of the discipline of nematology
 - Alfred Cogniaux (1841–1916), Belçikalı botanikçi (abbr. in botany: Cogn.)
 - Stanley Cohen (1922), Amerikalı biyolog, Nobel Prize Laureate in Physiology and Medicine (1986) for his discovery of growth factors.
 - James J. Collins, Amerikalı biyolog, synthetic biology and systems biology pioneer
 - Henry Boardman Conover (1892–1950), Amerikalı ornitolog
 - Timothy Abbott Conrad (1803–1877), Amerikalı malacologist
 - James Graham Cooper (1830–1902), Amerikalı doğabilimci
 - William Cooper (1798–1864), Amerikalı conchologist
 - Edward Drinker Cope (1840–1897), fish, reptiles, paleontology
 - Charles Coquerel (1822–1867), Fransız navy surgeon and entomolog
 - Carl Ferdinand Cori (1896–1984), Amerikalı biochemist, winner of the 1947 Nobel Prize in Physiology or Medicine for his work on the Cori cycle
 - Gerty Cori (1886–1957), Amerikalı biochemist, first Amerikalı woman to win a Nobel Prize in science, the prize was awarded to her and her husband Carl for their work on the Cori cycle
 - Charles B. Cory (1857–1921), Amerikalı ornitolog
 - Emanuel Mendez da Costa (1717–1791), İngiliz botanikçi, doğabilimci, filozof
 - Elliott Coues (1842–1899), Amerikalı ornitolog
 - Marjorie Courtenay-Latimer (1907–2004), South African zoolog
 - Jacques Cousteau (1910–1997), Fransız marine biyolog and explorer
 - Miguel Rolando Covian (1913–1992), Argentine-Brezilyalı neurophysiologist, father of Brezilyalı neurophysiology
 - Frederick Vernon Coville (1867–1937), Amerikalı botanikçi
 - Robert K. Crane, (1919), Amerikalı biyokimyacı, sodyum-glikoz kotransportunu keşfetti.
 - Philipp Jakob Cretzschmar (1786–1845), Alman zoolog
 - Francis Crick (1916–2004), one of the discoverers of the structure of the DNA molecule and a neurobiyolog
 - Joseph Charles Hippolyte Crosse (1826–1898), Fransız conchologist
 - Nicholas Culpeper (1616–1654), İngiliz botanikçi
 - Allan Cunningham (1791–1839), İngiliz botanikçi
 - William Curtis (1746–1799), İngiliz botanikçi
 - Georges Cuvier (1769–1832), Fransız doğabilimci


## D.
 - Valerie Daggett, Amerikalı bioengineer
 - Anders Dahl (1751–1789), namesake of the Dahlia
 - William Healey Dall (1845–1927), Amerikalı doğabilimci and malacologist.
 - Charles Darwin (1809–1882), Britanyalı doğabilimci, author and biyolog
 - Erasmus Darwin (1731–1802), doctor, doğabilimci, grandfather of Charles
 - Charles Davenport (1866–1944), Amerikalı biyolog and eugenicist, founded the Eugenics Record Office at Cold Spring Harbor Laboratory
 - Armand David (1826–1900), Fransız zoolog and botanikçi
 - Bernard Davis (1916–1994), Amerikalı biyolog
 - Richard Dawkins (1941), Britanyalı evolutionary biyolog
 - Pierre Antoine Delalande (1787–1823), Fransız doğabilimci
 - Max Delbrück (1906–1981), Alman physicist and biyolog known for work on the replication mechanism of viruses
 - Richard Dell (1920–2002), Yeni Zelandalı malacologist
 - Stefano Delle Chiaje (1794–1860), İtalyan 
 - Paul Émile de Puydt (1810–1888), Belçikalı botanikçi
 - René Louiche Desfontaines (1750–1833), Fransız botanikçi
 - Gérard Paul Deshayes (1795–1875), Fransız geologist and conchologist.
 - Anselme Gaëtan Desmarest (1784–1838), Fransız zoolog
 - Ernst Dieffenbach (1811–1855), Alman doğabilimci
 - Johann Jacob Dillenius (1684–1747), Alman botanikçi
 - Lewis Weston Dillwyn (1778–1855), Britanyalı botanikçi and conchologist
 - Walter Dobrogosz (1933), Amerikalı microbiyolog, discoverer of "Lactobacillus reuteri"
 - Theodosius Dobzhansky (1900–1975), Amerikalı geneticist and evolutionary biyolog
 - Rembert Dodoens (1517–1585), Flemish botanikçi
 - Anton Dohrn (1840–1909), Alman marine biyolog
 - David Don (1799–1841), Britanyalı botanikçi
 - James Donn (1758–1813), İngiliz botanikçi
 - Jean Dorst (1924–2001), Fransız ornitolog
 - Henry Doubleday (1808–1875), Britanyalı entomolog
 - David Douglas (1799–1834), İskoç botanikçi
 - Jonas C. Dryander (1748–1810), Swedish botanikçi
 - Félix Dujardin (1802–1860), biyolog
 - Renato Dulbecco (1914–2012), biyolog
 - Ronald Duman, Biological psychiatry
 - André Marie Constant Duméril (1774–1860), Fransız zoolog
 - Michel Felix Dunal (1789–1856), Fransız botanikçi
 - Robin Dunbar (1947), İtalyan virolog
 - Gerald Durrell (1925–1995), Britanyalı doğabilimci


## E.
 - Sylvia Earle (1935), Amerikalı oceanographer
 - John Carew Eccles (1903–1997), Australian neurophysiologist and winner of the 1963 Nobel Prize in Physiology or Medicine for his work on the synapse
 - Christian Friedrich Ecklon (1795–1868), Danimarkalı botanikçi (abbr. in botany: Eckl.)
 - Gerald Edelman (1929), Nobel Prize for immunology work, later work in neuroscience
 - George Edwards (1693–1773), Britanyalı doğabilimci
 - Christian Gottfried Ehrenberg (1795–1876), Alman biyolog and microscopist
 - Paul Ehrlich (1854–1915), Alman Nobel Prize-winning immunologist
 - Karl Eichwald (1795–1876), Rus geologist and physician
 - Theodor Eimer (1843–1898), Alman zoolog
 - George Eliava (1892–1937), Georgian microbiyolog
 - Daniel Giraud Elliot (1835–1915), Amerikan zoolog
 - Günther Enderlein (1872–1968), Alman zoolog and entomolog
 - Stephan Ladislaus Endlicher (1804–1849), Austrian botanikçi (abbr. in botany: Endl.)
 - Michael S. Engel (1971), Amerikalı paleontologist and entomolog
 - George Engelmann (1809–1884), Alman-Amerikalı botanikçi
 - Adolf Engler (1844–1930), Alman botanikçi (abbr. in botany: Engl.)
 - Johann Christian Polycarp Erxleben (1744–1777), Alman doğabilimci.
 - Johann Friedrich von Eschscholtz (1793–1831), Baltic Alman biyolog and explorer, namesake of the California poppy
 - Constantin von Ettingshausen (1826–1897), Austrian botanikçi
 - Warren Ewens, Amerikalı mathematical population geneticist
 - Thomas Campbell Eyton (1809–1880), İngiliz doğa bilimci


## F.
 - Jean Henri Fabre (1823–1915), Fransız entomolog
 - Johan Christian Fabricius (1745–1808), Danimarkalı entomolog
 - David Fairchild (1869–1954), Amerikalı botanikçi
 - Hugh Falconer (1808–1865), İskoç paleontologist
 - Leonardo Fea (1852–1903), İtalyan zoolog
 - Christoph Feldegg (1780–1845), Austrian doğabilimci
 - Lewis J. Feldman (1945), Amerikalı botanikçi
 - Howard Barraclough (Barry) Fell (1917–1994), İngiliz zoolog and pre-Columbian contact theorist
 - Sérgio Ferreira (1934), Brezilyalı pharmacologist
 - Harold John Finlay (1901–1951), Yeni Zelandalı palaeontologist and conchologist
 - Otto Finsch (1839–1917), Alman doğabilimci
 - Johann Fischer von Waldheim (1771–1853), Alman entomolog
 - James Fisher (1922–1970), İngiliz ornitolog
 - Paul Henri Fischer (1835–1893): Fransız physician, zoolog, malacologist and paleontologist
 - Ronald Fisher (1890–1962), Britanyalı biyolog and statistician, one of the founders of population genetics
 - Leopold Fitzinger (1802–1884), Austrian zoolog
 - Tim Flannery (1956-), Australian biyolog
 - Jim Flegg, Britanyalı ornitolog
 - Alexander Fleming (1881–1955), Britanyalı medical scientist
 - Walther Flemming (1843–1905), Alman physician and anatomist, discoverer of mitosis and chromosomes
 - Thomas Bainbrigge Fletcher (1878–1950), İngiliz entomolog
 - Howard Walter Florey (1898–1968), pharmacologist who was the co-inventor of penicillin
 - Brian J. Ford (1939), Britanyalı biyolog and writer
 - E. B. Ford (1901–1988), Britanyalı ecological geneticist
 - Peter Forsskål (1732–1763), Swedish doğabilimci
 - Georg Forster (1754–1794), Alman doğabilimci (abbr. in botany: G.Forst.)
 - Peter Forster (geneticist) (1967), Alman geneticist 
 - Johann Reinhold Forster (1729–1798), Alman doğabilimci
 - Robert Fortune (1813–1880), İskoç botanikçi
 - Dian Fossey (1932–1985), Amerikan zoolog
 - Rosalind Franklin (1920–1958), contributor to the discovery of the structure of DNA
 - Francisco Freire Allemão e Cysneiro (1797–1874), Brezilyalı botanikçi
 - Elias Magnus Fries (1794–1878), one of the founders of modern mushroom taxonomy
 - Karl von Frisch (1886–1982), Austrian ethologist and Nobel laureate, best known for pioneering studies of bees
 - Imre Frivaldszky (1799–1870), Hungarian botanikçi
 - Leonhart Fuchs (1501–1566), Alman botanikçi
 - José María de la Fuente Morales (1855–1932), Spanish biyolog
 - Louis Agassiz Fuertes (1874–1927), Amerikalı ornitolog


## G.
 - Heinrich Moritz Gaede (1795-1834) Alman doğa bilimci ve entomolog.
 - Johann Christian Gerning (1745-1802) Alman bankacı, sanat koleksiyoncusu ve böcek bilimcisi 
 - Gustav Tornier (1858-1938) Alman zoolog ve herpetolog
 - Joseph Gaertner (1732–1791), Alman botanikçi
 - François Gagnepain (1866–1952), Fransız botanikçi
 - Joseph Paul Gaimard (1796–1858), Fransız
 - Biruté Galdikas (1946), Canadian primatologist, conducted pioneering studies on orangutans
 - Robert Gallo (1937), Amerikalı virolog and co-discoverer of HIV
 - William Gambel (1823–1849), Amerikalı doğabilimci
 - Prosper Garnot (1794–1838), Fransız doğabilimci
 - Charles Gaudichaud-Beaupré (1789–1854), Fransız botanikçi
 - Michael Gazzaniga, Amerikalı cognitive neuroscientist, best known for his research on split-brain patients
 - Howard Scott Gentry (1903–1993), Amerikalı botanikçi
 - John Gerard (1545–1611/12), İngiliz botanikçi
 - Conrad von Gesner (1516–1565), Swiss doğabilimci (abbr. in botany: Gesner)
 - Luca Ghini (1490–1566), İtalyan botanikçi
 - Clelia Giacobini (1931–2010), İtalyan microbiyolog, a pioneer of microbiology applied to conservation-restoration
 - John H. Gillespie, Amerikalı molecular evolutionist and population geneticist
 - Charles Henry Gimingham (1923), Britanyalı botanikçi
 - Charles Frédéric Girard (1822–1895), Fransız biyolog, ichthyologist, herpetologist
 - Johann Friedrich Gmelin (1748–1804), Alman doğabilimci (abbr. in botany: J.F.Gmel.)
 - Johann Georg Gmelin (1709–1755), Alman doğabilimci (abbr. in botany: J.G.Gmel.)
 - Samuel Gottlieb Gmelin (1744–1774), Alman botanikçi (abbr. in botany: S.G.Gmel.)
 - Frederick DuCane Godman (1834–1919), İngiliz doğa bilimci and ornitolog
 - Émil Goeldi (1859–1917), Swiss-Brezilyalı doğabilimci and zoolog
 - Johann Wolfgang von Goethe (1749–1832), known for his literary works but also a scientist. In biology: his theory of plant metamorphosis stipulated that all plant formation stems from a modification of the Leaf.
 - Camillo Golgi (1843–1926), İtalyan physician and Nobel prize winner, pioneer in neurobiology
 - Jane Goodall (1934), Britanyalı primatologist, ethologist and anthropologist, best known for conducting a forty-year study of chimpanzee social and family life.
 - George Gordon (1806–1879), Britanyalı botanikçi
 - Philip Henry Gosse (1810–1888), İngiliz doğa bilimci 
 - Augustus Addison Gould (1805–1866), Amerikalı conchologist.
 - John Gould (1804–1881), İngiliz ornitolog
 - Stephen Jay Gould (1941–2002), Amerikalı paleontologist
 - Alfred Grandidier (1836–1921), Fransız doğabilimci and explorer
 - Guillaume Grandidier (1873–1957), Fransız doğabilimci and explorer son of Alfred Grandidier
 - Temple Grandin (1947), Amerikalı animal scientist  world-renowned as a designer of humane livestock facilities and for her writings on her experience with autism
 - Chapman Grant (1887–1983), Amerikalı herpetologist
 - Pierre-Paul Grassé (1895–1985), Fransız zoolog
 - Asa Gray (1810–1888), Amerikalı botanikçi
 - George Robert Gray (1808–1872), İngiliz zoolog
 - J.E. Gray (1800–1875), Britanyalı zoolog
 - Andrew Jackson Grayson (1819–1869), Amerikalı ornitolog
 - William King Gregory (1876–1970), Amerikan zoolog
 - Edward Grey, 1st Viscount Grey of Fallodon (1862–1933), Britanyalı ornitolog
 - Frederick Griffith (1879–1941), Britanyalı bacteriologist
 - Jeremy Griffith (1945), Australian zoolog
 - Jan Frederik Gronovius (1690–1762), Hollandalı botanikçi
 - Pavel Grošelj (1883–1940), biyolog and belletrist
 - Félix Édouard Guérin-Méneville (1799–1874), Fransız entomolog
 - Johann Anton Güldenstädt (1745–1781), Alman doğabilimci
 - Allvar Gullstrand (1862–1930), Swedish ophthalmologist, winner of the 1911 Nobel Prize for Physiology or Medicine "for research on the image formation by the lens of the eye"
 - Johann Ernst Gunnerus (1718–1773), Norwegian botanikçi
 - Albert C. L. G. Günther (1830–1914), British/Alman zoolog


## H.
 - Ernst Haeckel (1834–1919), Alman physician, zoolog and evolutionist
 - Hermann August Hagen (1817–1893), Alman entomolog
 - J. B. S. Haldane (1892–1964), Britanyalı evolutionary biyolog and co-founder of population genetics
 - William Donald Hamilton (1936–2000), Britanyalı evolutionary biyolog
 - Sylvanus Charles Thorp Hanley (1819–1899), Britanyalı conchologist and malacologist
 - Thomas Hardwicke (1755–1835), İngiliz doğa bilimci 
 - Alister Clavering Hardy (1896–1985), İngiliz marine biyolog and pioneer student of the biological basis of religion
 - Richard Harlan (1796–1843), Amerikalı doğabilimci, zoolog, physicist and paleontologist
 - Denham Harman (1916), Amerikalı biogerontologist, father of the free radical theory of aging
 - Maarten 't Hart (1944), Hollandalı biyolog and writer
 - Ernst Hartert (1859–1933), Alman ornitolog
 - Gustav Hartlaub (1814–1900), Alman zoolog
 - Karl Theodor Hartweg (1812–1871), Alman botanikçi
 - William Henry Harvey (1811–1866), Irish phycologist
 - Hans Hass (1919), Austrian biyolog
 - Frederik Hasselquist (1722–1752), Swedish doğabilimci
 - Arthur Hay, 9th Marquess of Tweeddale (1824–1878), İngiliz ornitolog
 - James Hector (1834–1907), İskoç geologist, doğabilimci, and surgeon
 - Charles Hedley (1862–1926), doğabilimci, active in Australia
 - Oskar Heinroth (1871–1945), Alman biyolog, a founder of ethology
 - Wilhelm Hemprich (1796–1825), Alman doğabilimci
 - Willi Hennig (1913–1976) Alman biyolog, founder of cladistics
 - John Stevens Henslow (1796–1861), İngiliz mineralogist, botanikçi and clergyman
 - Johann Hermann (1738–1800), Fransız physician and doğabilimci
 - Albert William Herre (1868–1962), Amerikalı ichthyologist and lichenologist
 - Alfred Hershey (1908–1997), Amerikalı bacteriologist, winner of the 1969 Nobel Prize in Physiology or Medicine for his work on the genetics of viruses
 - Philip Hershkovitz (1909–1997), Amerikalı mammalogist noted especially as a primatologist
 - Leo George Hertlein (1898–1972), Amerikalı paleontologist and malacologist
 - Archibald Vivian Hill (1886–1977), Britanyalı physiologist, winner of the 1922 Nobel Prize in Physiology or Medicine for elucidation of mechanical work in muscles
 - Brian Houghton Hodgson (1800–1894), İngiliz doğa bilimci 
 - Jan van der Hoeven (1802–1868), Hollandalı zoolog
 - Bruno Hofer (1861–1916), Alman fisheries scientist
 - Johann Centurius Hoffmannsegg (1766–1849), Alman botanikçi, entomolog and ornitolog
 - Jacques Bernard Hombron (1798–1852), Fransız doğabilimci
 - Leroy Hood (1939), Amerikalı biochemist, developed high speed automated DNA sequencer
 - Robert Hooke (1635–1703), Britanyalı natural filozof and Secretary to the Royal Society
 - Joseph Dalton Hooker (1817–1911), Britanyalı botanikçi, explorer and Director of Kew Botanic Gardens
 - William Jackson Hooker (1785–1865), Britanyalı botanikçi, Director of Kew Botanic Gardens
 - John "Jack" Horner (1946), Amerikalı paleontologist, specialized in dinosaurs
 - Thomas Horsfield (1773–1859), Amerikalı doğabilimci
 - Bernardo Houssay (1887–1971), Argentine physiologist, winner of the 1947 Nobel Prize in Physiology or Medicine for the function of the pituitary hormones in regulating blood sugar (glucose) in animals.
 - Martinus Houttuyn (1720–1798), Hollandalı doğabilimci
 - Albert Howard (1873–1947), Britanyalı botanikçi
 - Eliot Howard (1873–1940), İngiliz ornitolog
 - Sarah Blaffer Hrdy (1946), U.S. anthropologist who made contributions to evolutionary psychology and sociobiology
 - David H. Hubel (1926), Canadian-d. Amerikalı neurobiyolog, winner of the 1981 Nobel Prize in Physiology or Medicine for research on the visual system
 - François Huber (1750–1831), Swiss doğabilimci
 - Ambrosius Hubrecht (1853–1915), Hollandalı zoolog
 - William Henry Hudson (1841–1922), Argentinian-Britanyalı ornitolog
 - Alexander von Humboldt (1769–1859), Alman doğabilimci and explorer
 - Allan Octavian Hume (1829–1912), Britanyalı ornitolog
 - Rob Hume, Britanyalı ornitolog
 - George Evelyn Hutchinson (1903–1991), Amerikalı ecologist and limnologist
 - Frederick Wollaston Hutton (1835–1905), İngiliz biyolog and geologist, later worked in Yeni Zelandalı
 - Julian Sorell Huxley (1887–1975), İngiliz zoolog and contributor to the modern evolutionary synthesis  first D-G of UNESCO
 - Thomas Henry Huxley (1825–1895), İngiliz zoolog and advocate of evolution, agnosticism and scientific education
 - Alpheus Hyatt (1838–1902), Amerikalı neo-Lamarckian
 - Libbie Hyman (1888–1969), invertebrate zoolog
 - Josef Hyrtl (1810–1894), Austrian anatomist


## I.
  - Hermann von Ihering (1850–1930), Alman doğabilimci
  - Johann Karl Wilhelm Illiger (1775–1813), Alman entomolog
  - Jan Ingenhousz (1730–1799), Hollandalı-born Britanyalı botanikçi
  - Tom Iredale (1880–1972), İngiliz conchologist and ornitolog
  - Paul Erdmann Isert (1756–1789), Alman botanikçi


## J.
  - François Jacob (d. 1920), Fransız Biologist, Nobel Prize
  - Nikolaus Joseph von Jacquin (1727–1817), Hollandalı-born Austrian botanikçi
  - Honoré Jacquinot (1815–1887), Fransız surgeon and zoolog
  - Daniel H. Janzen (d. 1939), Amerikalı entomolog and ecologist
  - William Jardine (1800–1874), İskoç doğabilimci
  - Feliks Pawel Jarocki (1790–1865), Polish zoolog
  - Thomas C. Jerdon (1811–1872), Britanyalı zoolog and botanikçi
  - Wilhelm Johannsen (1857–1927), (coined the term gene)
  - David Starr Jordan (1851–1931), ichthyologist, 1st president of Stanford
  - Félix Pierre Jousseaume (1835–1921), Fransız zoolog and malacologist
  - Adrien-Henri de Jussieu (1797–1853), Fransız botanikçi
  - Antoine de Jussieu (1686–1758), Fransız doğabilimci
  - Antoine Laurent de Jussieu (1748–1836), botanikçi, biyolog (abbr. in botany: Juss.)
  - Bernard de Jussieu (1699–1777), Fransız doğabilimci
  - Ernest Everett Just (1883–1941), Amerikalı biyolog


## K.
  - Zbigniew Kabata (d. 1924), Polish parasitologist
  - Pehr Kalm (1716–1779), Swedish botanikçi
  - Eric R. Kandel (d. 1929), Austrian-born Amerikalı neuroscientist. Winner of the 2000 Nobel Prize in Physiology or Medicine for his work on the neural correlates of memory
  - Gustav Karl Wilhelm Hermann Karsten (1817–1908), Alman botanikçi
  - Rudolf Kaufmann (1909–c1941), trilobitologist known for his contributions to allopatric speciation and punctuated equilibrium.
  - Stuart Kauffman (d. 1939), biyolog widely known for his promotion of self-organization as a factor in producing the complexity of biological systems and organisms
  - Johann Jakob Kaup (1803–1873), Alman doğabilimci
  - Janet Kear (1933–2004), İngiliz ornitolog
  - Gerald A. Kerkut (1927–2004), Britanyalı zoolog and physiologist
  - Anton Kerner von Marilaun (1831–1898), Austrian botanikçi
  - Robert Kerr (1755–1813), published "The Animal Kingdom" in 1792
  - Warwick Estevam Kerr (d. 1922), Brezilyalı geneticist, specialist in bee genetics, introducer of African bees in Brazil
 - Zofia Kielan-Jaworowska (d. 1925), Polish paleontologist, led several paleontological expeditions to the Gobi desert
  - Motoo Kimura (1924–1994), Japanese mathematical biyolog, working in the field of theoretical population genetics
  - Norman Boyd Kinnear (1882–1957), İskoç zoolog
  - William Kirby (1759–1850), İngiliz entomolog
  - Heinrich von Kittlitz (1799–1874), Alman doğabilimci
  - Wilhelm Kobelt (1840–1916), Alman zoolog and malacologist
  - Fritz Köberle (1910–1983), Austrian-Brezilyalı physician and pathologist, student of Chagas disease
  - Karl Koch (1809–1879), Alman botanikçi
  - Robert Koch (1843–1910), Alman Nobel Prize-winning physician and bacteriologist
  - Emil Theodor Kocher (1841–1917), Alman physician, winner of the 1909 Nobel Prize in Physiology or Medicine for "his work on the physiology, pathology and surgery of the thyroid gland"
  - Alexander Koenig (1858–1940), Alman doğabilimci
  - Albert von Kölliker (1817–1905), Swiss physiologist
  - Charles Konig (1774–1851), Alman doğabilimci
  - Arthur Kornberg (d. 1918), discovered DNA polymerase
  - Adriaan Kortlandt, (d. 1918), Hollandalı ethologist
  - Albrecht Kossel (1853–1927), Alman physician and winner of the 1910 Nobel Prize in Physiology or Medicine for his research in cell biology
  - Hans Adolf Krebs (1900–1981), Alman biochemist and winner of the 1953 Nobel Prize in Physiology or Medicine for his discovery of the citric acid cycle in cellular respiration
  - Gerard Krefft (1830–1881), Alman-born Australian zoolog and palaeontologist
  - Eduardo Krieger (d. 1930), Brezilyalı physician and physiologist
  - Kewal Krishan (d. 1973), Biological Anthropologist, specialized in Forensic Anthropology, serving at Panjab University, Chandigarh, India
  - Schack August Steenberg Krogh (1874–1949), Danimarkalı physiologist, winner of the 1920 Nobel Prize in Physiology or Medicine for the discovery of the mechanism of regulation of the capillaries in skeletal muscle
  - Heinrich Kuhl (1797–1821), Alman zoolog


## L.
  - Johann Georg Christian Lehmann (25 Şubat 1792 - 12 Şubat 1860) bir Alman botanikçi
  - Henri Laborit (1914–1995), Fransız surgeon and physiologist
  - Bernard Germain Étienne de la Ville, Comte de Lacépède (1756–1825), Fransız doğabilimci
  - David Lack (1910–1973), Britanyalı ornitolog
  - Frédéric de Lafresnaye (1783–1861), Fransız ornitolog
  - Jean-Baptiste Lamarck (1744–1829), Fransız evolutionist, coined many terms like "biology" and "fossils"
  - Aylmer Bourke Lambert (1761–1842), Britanyalı botanikçi
  - Charles Lamberton (fl. 1912–1956), Fransız paleontologist
  - Hugh Lamprey (1928–1996), Britanyalı ecologist
  - Kai Larsen (1926–2012), Danimarkalı botanikçi
  - Charles Francis Laseron (1887–1959), Amerikalı-born Australian doğabilimci and malacologist
  - John Latham (1740–1837), İngiliz doğa bilimci 
  - Pierre André Latreille (1762–1833), Fransız entomolog
  - Charles Louis Alphonse Laveran (1845–1922), Fransız physician, winner of the 1907 Nobel Prize in Physiology or Medicine for his discovery that the cause of malaria is a protozoon
  - George Newbold Lawrence (1806–1855), Amerikalı ornitolog
 - William Elford Leach (1790–1836), İngiliz zoolog and marine biyolog
 - Colin Leakey (d. 1933), Britanyalı tropical botanikçi and specialist in bean science
 - Joseph LeConte (1823–1901), physiologist
 - Tim Lee (d. 1977), comedian
 - Antoni van Leeuwenhoek (1632–1723), Hollandalı biyolog, developer of the microscope
 - François Leguat (c. 1637 – 1735), Fransız doğabilimci
 - Joseph Leidy (1823–1891), Amerikalı paleontologist
 - Johann Philipp Achilles Leisler (1771–1813), Hollandalı doğabilimci
 - Juan Lembeye (1816–1889), Spanish doğabilimci
 - Leonardo da Vinci (1452–1519), known as an artist but also an anatomist. Dissected hundreds of specimens and drew exact copies of them
 - Jean Baptiste Leschenault de la Tour (1773–1826), Fransız botanikçi
 - Rene Primevere Lesson (1794–1849), Fransız doğabilimci
 - Charles Alexandre Lesueur (1778–1846), Fransız doğabilimci
 - François Le Vaillant (1753–1824), Fransız ornitolog
 - Edward B. Lewis (1918–2004), Amerikalı geneticist and 1995 Nobel Prize-winner
 - Richard Lewontin (d. 1929), biyolog
 - Wen-Hsiung Li, molecular evolutionary biyolog
 - Emmanuel Liais (1826–1900), Fransız botanikçi
 - Martin Lichtenstein (1780–1867), Alman zoolog
 - John Lightfoot (1735–1788), İngiliz conchologist and botanikçi
 - David R. Lindberg, Amerikalı malacologist and biyolog
 - Aristid Lindenmayer (1925–1989), Hungarian biyolog
 - John Lindley (1799–1865), İngiliz botanikçi
 - Heinrich Friedrich Link (1767–1850), Alman botanikçi (abbr. in botany: Link)
 - Carl Linnaeus (1707–1778), Swedish botanikçi  father of the binomial nomenclature system (abbr L. or Linn.)
 - Jacques Loeb (1859–1924), Alman-Amerikalı biyolog
 - Friedrich Loeffler (1852–1915), Alman biyolog
 - Konrad Lorenz (1903–1989), Austrian founder of ethology
 - Harri Lorenzi (d. 1949), Brezilyalı botanikçi
 - John Claudius Loudon (1783–1843), İngiliz botanikçi
 - James Lovelock (d. 1919), İngiliz chemist and father of the "Gaia hypothesis"
 - Percy Lowe (1870–1948), İngiliz ornitolog
 - Peter Wilhelm Lund (1801–1880), Danimarkalı zoolog and paleontologist
 - Salvador Luria (1912–1991), microbiyolog, Nobel prize winner
 - Adolfo Lutz (1855–1940), Brezilyalı infectologist, pathologist and public health researcher
 - André Lwoff (1902–1994), Fransız microbiyolog, winner of the 1965 Nobel Prize in Physiology or Medicine
 - Richard Lydekker (1849–1915), İngiliz doğa bilimci 
 - Trofim Lysenko (1898–1976), Soviet biyolog and agronomist. His denouncement of genetics became known as Lysenkoism.


## M.
### Ma-Mi.
 - Jules François Mabille (1831–1904), Fransız malacologist
 - John Macadam (1827–1865), İskoç-born Australian botanikçi
 - John M. MacDougal (1954), Amerikalı botanikçi
 - William MacGillivray (1796–1852), İskoç doğabilimci
 - Marcello Malpighi (1628–1694), İtalyan anatomist and biyolog
 - Ramon Margalef (1919–2004), Spanish-Catalan biyolog and ecologist
 - Leo Margolis (1927–1997), Canadian fisheries parasitologist
 - Lynn Margulis (1938), Amerikalı microbiyolog
 - Alberto della Marmora (1789–1863), İtalyan doğabilimci
 - Othniel Charles Marsh (1831–1899), paleontology
 - Barry Marshall (1951), Australian physician and microbiyolog, winner of the 2005 Nobel Prize in Physiology or Medicine for his discovery that most stomach ulcers are caused by a strain of bacteria
 - Fermín Martín Piera (1954–2001), Spanish botanikçi
 - Carl Friedrich Philipp von Martius (1794–1868), Alman botanikçi
 - John Martyn (1699–1768), İngiliz botanikçi
 - Thomas Martyn (1735–1825), İngiliz botanikçi, entomolog and conchologist
 - John Marwick (1891–1978), Yeni Zelandalı palaeontologist and geologist
 - Teresa Maryańska, Poland, paleontologist specializing in dinosaurs
 - Francis Masson (1741 – c. 1805), İskoç botanikçi 
 - Gregory Mathews (1876–1949), Australian ornitolog
 - Paul Matschie (1861–1926), Alman zoolog 
 - William Diller Matthew (1871–1930), Amerikalı paleontologist
 - Polly Matzinger, Amerikalı immunologist
 - Carl Maximowicz (1827–1891), Rus botanikçi
 - Harold Maxwell-Lefroy (1877–1925), İngiliz entomolog
 - Robert May (1936), biyolog, physicist, mathematician, President of Royal Society of London 2000–2005
 - Ernst Mayr (1904–2005), evolutionary biyolog
 - Barbara McClintock (1902–1992), Amerikalı biyolog, winner of a Nobel Prize for her work on the transposon, or "jumping gene"
 - James V. McConnell (1925–1990), Amerikalı biological psychologist
 - Mark McMenamin (1958), Amerikalı paleontologist
 - Bruce McEwen, neuroendocrinologist and stress hormone expert
 - Edmund Meade-Waldo (1855–1934), İngiliz ornitolog
 - Ilya Ilyich Mechnikov (1845–1916), Rus microbiyolog, best known for his work on the immune system and phagocytosis, received the Nobel Prize in Physiology or Medicine in 1908
 - Johann Wilhelm Meigen (1764–1845), Alman entomolog
 - Gregor Mendel (1822–1884), Czech-Austrian monk who is often called the "father of genetics" for his study of the inheritance of traits in pea plants
 - Edouard Menetries (1802–1861), Fransız entomolog
 - Maud Leonora Menten, biyolog
 - Archibald Menzies (1754–1852), İskoç doğabilimci
 - Clinton Hart Merriam (1855–1942), Amerikan zoolog and ornitolog
 - John C. Merriam (1869–1945), Amerikalı biyolog
 - Franz Meyen (1804–1840), Alman botanikçi
 - Rodolphe Meyer de Schauensee (1901–1984), Amerikalı ornitolog
 - Otto Fritz Meyerhof (1884–1951), Alman/Amerikalı physician and biochemist, winner of the 1922 Nobel Prize in Physiology or Medicine for his research on muscles
 - Leonor Michaelis (1875–1949), Alman biyolog
 - André Michaux (1746–1802), Fransız botanikçi
 - Alexander von Middendorff (1815–1894), Rus zoolog
 - Nicholai Miklukho-Maklai (1846–1888), Rus marine biyolog and anthropologist
 - Gerrit Smith Miller, Jr. (1869–1956), Amerikan zoolog.
 - Jacques Miller (1931), Australian immunologist.
 - John Frederick Miller (1759–1796), İngiliz illustrator (primarily of botany)
 - Kenneth R. Miller (1948), Amerikalı evolutionary biyolog.
 - Philip Miller (1691–1771), İskoç botanikçi (abbr. in botany: Mill.)
 - Alphonse Milne-Edwards (1835–1900), Fransız zoolog
 - Henri Milne-Edwards (1800–1885), Fransız zoolog
 - George Jackson Mivart (1827–1900), İngiliz biyolog


### Mo-Mu.
 - Hugo von Mohl (1805–1872), Alman botanikçi
 - Paul Möhring (1710–1792), Alman doğabilimci
 - Juan Ignacio Molina (1740–1829), Chilean doğabilimci
 - Jacques Monod (1910–1976), geneticist
 - George Montagu (1753–1815), İngiliz doğa bilimci 
 - Luc Montagnier (1932), Fransız discoverer of HIV
 - Rita Levi-Montalcini (1909), İtalyan-Amerikalı neurologist who received the 1986 Nobel Prize in Physiology or Medicine for her co-discovery of growth factors
 - Tommaso di Maria Allery Monterosato (1841–1927), İtalyan malacologist
 - Pierre Dénys de Montfort (1766–1820), Fransız doğabilimci
 - George Thomas Moore (1871–1956), Amerikalı botanikçi
 - Alfred Moquin-Tandon (1804–1863), Fransız doğabilimci
 - Otto Andreas Lowson Mörch (1828–1878), malacologist
 - Thomas Hunt Morgan (1868–1945), Amerikalı geneticist. He worked on the natural history, zoology, and macromutation in the fruit fly "Drosophila"
 - Desmond Morris (1928), Britanyalı zoolog and biyolog
 - Roger Morse (1927–2000), professor, researcher, author, on bees/beekeeping
 - Guy Mountfort (1905–2003), İngiliz ornitolog
 - Ladislav Mucina (1956), Slovakian botanikçi
 - Ferdinand von Mueller (1825–1896), Alman-Australian botanikçi
 - John Muir (1838–1914), Amerikalı doğabilimci
 - Otto Friedrich Müller (1730–1784), Danimarkalı doğabilimci (abbr. in botany: O.F.Müll.)
 - Fritz Müller (1821–1897), Alman-Brezilyalı doğabilimci (abbr. in botany: F.J.Müll.)
 - Hermann Müller (Thurgau) (1850–1927), Swiss botanikçi and oenologist
 - Philipp Ludwig Statius Müller (1725–1776), Alman zoolog
 - Salomon Muller (1804–1864), Hollandalı doğabilimci
 - Kary Mullis (1944), biyolog
 - Otto von Münchhausen (1716–1774), Alman botanikçi
 - John Murray (1841–1914), Scots-Canadian Marine Biologist


## N.
 - Gary Paul Nabhan (d. 1952), co-author of Forgotten Pollinators
 - Karl Wilhelm von Nageli (1817–1891), Swiss botanikçi
 - Johann Friedrich Naumann (1780–1857), Alman founder of scientific ornithology
 - John Needham (1713–1781), İngiliz doğa bilimci 
 - Christian Gottfried Daniel Nees von Esenbeck (1776–1858), Alman botanikçi and zoolog
 - Masatoshi Nei, Amerikalı evolutionary biyolog and molecular Population Geneticist
 - Randolph M. Nesse (d. 1945), Amerikalı evolutionary biyolog and psychiatrist
 - Charles F. Newcombe (1851–1924), Britanyalı botanikçi
 - Alfred Newton (1829–1907), İngiliz zoolog
 - Margaret Morse Nice (1883–1974), Amerikalı ornitolog
 - Henry Alleyne Nicholson (1844–1899), Britanyalı zoolog
 - Elmer Noble (1909–2001), Amerikalı parasitologist
 - Alfred Merle Norman (1831–1918), İngiliz clergyman and doğabilimci
 - Alfred John North (1855–1917), Australian ornitolog
 - Christiane Nüsslein-Volhard (d. 1942), Alman biyolog and 1995 Nobel Prize-winner
 - Thomas Nuttall (1786–1858), İngiliz botanikçi and zoolog


## O.
 - Nils Hjalmar Odhner (1884–1973), Swedish zoolog
 - Eugene P. Odum (1913–2002), Amerikalı ecologist
 - Howard T. Odum (1924–2002), Amerikalı ecologist
 - Anders Sandoe Oersted (1816–1872), Danimarkalı botanikçi (abbr. in botany: Oerst.)
 - William Ogilby (1808–1873), Irish doğabilimci
 - William Robert Ogilvie-Grant (1863–1924), İskoç ornitolog
 - Tomoko Ohta (d. 1933), Japanese molecular evolutionary biyolog
 - Lorenz Oken (1779–1851), Alman doğabilimci
 - Giuseppe Olivi (1769–1795), İtalyan doğabilimci
 - Mark A. O'Neill, Britanyalı biyolog and computer scientist
 - Aleksandr Oparin (1894–1980), Rus biyolog and biochemist, best known for his work on the origin of life
 - Alcide d'Orbigny (1802–1857), Fransız doğabilimci
 - George Ord (1781–1866), Amerikalı ornitolog
 - Eleanor Anne Ormerod (1828–1901), İngiliz entomolog
 - Edward Latham Ormerod (1819–1873), FRS, İngiliz physician and entomolog
 - Henry Fairfield Osborn (1857–1935), eugenicist, AMNH curator
 - William Charles Osman Hill (1901–1975), Britanyalı anatomist, primatologist, and a leading authority on primate anatomy during the 20th century
 - Halszka Osmólska (1930–2008), Polish paleontologist specializing in dinosaurs
 - Emile Oustalet (1844–1905), Fransız zoolog
 - Richard Owen (1804–1892), biyolog of nebres(triztan) organisms


## P.
 - George Emil Palade (d. 1912), Romanian-Amerikalı biyolog, discoverer of ribosomes, Nobel Prize
 - Paul Maurice Pallary (1869–1942), Fransız-Algerian malacologist
 - Perle Altangerel (1945-) Moğol paleontolog
 - Peter Simon Pallas (1741–1811), Rus zoolog
 - Edward Palmer (1829–1911), Britanyalı botanikçi
 - Josif Pancic (1814–1888), Serbian botanikçi
 - Paracelsus (1493–1541), Alman alchemist
 - Louis Pasteur (1822–1895), Fransız biochemist
 - William Paterson (1755–1810), Britanyalı botanikçi and explorer
 - Robert Patterson (1802–1872), Irish doğabilimci
 - Daniel Pauly (d. 1946), Fransız marine biyolog
 - Ivan Pavlov (1849–1936), Rus physiologist, psychologist and physician, discovered conditioning, won the Nobel Prize for his research on the digestive system
 - Titian Peale (1799–1885), Amerikalı doğabilimci
 - Donald C. Peattie (1898–1964), Amerikalı botanikçi
 - Eva J. Pell (d. 1948), Amerikalı plant pathologist
 - Paul Pelseneer (1863–1945), Belçikalı malacologist
 - Jean-Marie Pelt (d. 1933), Fransız botanikçi
 - Thomas Pennant (1726–1798), Welsh doğabilimci and antiquary
 - Henri Perrier de la Bâthie (1873–1958), Fransız botanikçi
 - George Perry (doğabilimci), 19th century İngiliz doğa bilimci 
 - Christiaan Hendrik Persoon (1761–1836), biyolog
 - Paul Petard (1912–1980), Fransız botanikçi
 - Wilhelm Peters (1815–1883), Alman doğabilimci
 - Ludwig Karl Georg Pfeiffer, Alman physician, botanikçi and conchologist
 - Rodolfo Amando Philippi (1808–1904), Alman-Chilean zoolog
 - Constantine John Phipps (1744–1792), İngiliz explorer
 - David Andrew Phoenix, (d. 1966), Biochemist
 - Frederick Octavius Pickard-Cambridge (1860–?), İngiliz entomolog
 - Octavius Pickard-Cambridge (1828–1917), İngiliz entomolog, uncle of above
 - Charles Pickering (1805–1878), Amerikalı doğabilimci
 - Cándido Bolívar Pieltain (1897–1976), Spanish doğabilimci
 - Henry Augustus Pilsbry (1862–1957), Amerikan zoolog, malacologist
 - Gregory Goodwin Pincus (1903–1967), Amerikalı biyolog and co-inventor of the contraceptive pill
 - Ronald Plasterk, (d. 1957), Hollandalı molecular biyolog, columnist and politician
 - Pliny the Elder (23–79), Roman natural filozof
 - Reginald Innes Pocock (1863–1947), Britanyalı taxonomist (mammals and arachnids)
 - Felipe Poey (1799–1891), Cuban zoolog
 - Joel Roberts Poinsett (1779–1851), Amerikalı botanikçi
 - Henry de Puyjalon (1841–1905), Canadian ecologist and biyolog
 - Giuseppe Saverio Poli (1746–1825), İtalyan physicist, biyolog and natural historian
 - Winston Ponder, Australian malacologist
 - Arthur William Baden Powell (1901–1987), Yeni Zelandalı malacologist and paleontologist
 - Thomas Littleton Powys, 4th Baron Lilford (1833–1896), İngiliz ornitolog
 - Karel Presl (1794–1852), Bohemian botanikçi
 - Alice Pruvot-Fol (1873–1972), Fransız malacologist
 - Jan Evangelista Purkyně (1787–1869), Czech anatomist and physiologist
 - Frederick Traugott Pursh (1774–1820), Alman-Amerikalı botanikçi
 - Paul Émile de Puydt (1810–1888), Belçikalı botanikçi
 - Nikolai Przhevalsky (1839–1888), Rus explorer


## Q.
 - Jean Louis Armand de Quatrefages de Bréau (1810–1892), Fransız doğabilimci
  - Jean René Constant Quoy (1790–1869), Fransız hayvanbilimci


## R.
 - Gustav Radde (1831–1903), Alman doğabilimci
 - Thomas Stamford Raffles (1781–1826), Londra Zooloji Topluluğunun kurucusu ve ilk başkanı
 - Constantine Samuel Rafinesque (1783–1840), Fransız doğabilimci who described many North Amerikalı species
 - Émile Louis Ragonot (1843–1895), Fransız entomolog
 - Santiago Ramón y Cajal (1852–1934), Spanish histologist and Nobel laureate. Considered the father of neuroscience.
 - Edward Pierson Ramsay (1842–1916), Australian ornitolog
 - Austin L. Rand (1905–1982), Canadian zoolog
 - Lucie Randoin (1888–1960), Fransız biyolog
 - Suresh Rattan (d. 1955), Indian biogerontologist
 - John Ray (1627–1705), İngiliz doğa bilimci 
 - Francesco Redi (1626–1697), İtalyan physician known for his experiment in 1668 which is regarded as one of the first steps in refuting abiogenesis
 - Lovell Augustus Reeve (1814–1865), İngiliz conchologist
 - Heinrich Gustav Reichenbach (1823–1889), Alman orchidologist (abbr. in botany: Rchb. f.)
 - Ludwig Reichenbach (1793–1879), Alman botanikçi and ornitolog (abbr. in botany: Rchb.)
 - Anton Reichenow (1847–1941), Alman ornitolog
 - Caspar Georg Carl Reinwardt (1773–1854), Hollandalı botanikçi
 - Bernhard Rensch (1900–1990), Alman biyolog
 - Ralf Reski (d. 1958), Alman botanikçi and biotechnologist, developed Physcomitrella as model organism
 - Achille Richard (1794–1852), Fransız botanikçi (abbr. in botany: A. Rich)
 - Jean Michel Claude Richard (1787–1868), noted Fransız botanikçi and plant collector (abbr. in botany: J.M.C.Rich.)
 - Louis Claude Richard (1754–1821), Fransız botanikçi (abbr. in botany: Rich.)
 - Olivier Jules Richard (1836–1896), Fransız lichenologist (abbr. in botany: O.J.Rich.)
 - John Richardson (1787–1865), İskoç doğabilimci (abbr. in botany: Richardson)
 - Charles Richet (1850–1935), Fransız physiologist, winner of the 1913 Nobel Prize for Physiology or Medicine for his discovery of anaphylaxis
 - Charles Wallace Richmond (1868–1932), Amerikalı ornitolog
 - Robert Ridgway (1850–1929), Amerikalı ornitolog
 - Henry Nicholas Ridley (1855–1956), Britanyalı botanikçi (abbr. in botany: Ridl.)
 - Austin Roberts (1883–1948), South African zoolog
 - Harold E. Robinson (d. 1932), Amerikalı botanikçi and entomolog
 - Maurício Rocha e Silva (1910–1983), Brezilyalı physician and pharmacologist, codiscoverer of bradykinin
 - Martin Rodbell (1925–1998), biyolog
 - Peter Friedrich Röding (1767–1846), Alman malacologist
 - George Romanes (1848–1894), Canadian doğabilimci, founded the discipline of comparative psychology
 - Alfred Romer (1894–1973), specialist in vertebrate paleontology
 - Robert Rosen (1934–1998), theoretical biyolog
 - Joel Rosenbaum (d. 1933), cell biyolog at Yale University
 - Harald Rosenthal (d. 1937), Alman hydrobiyolog known for his work in fish farming and ecology
 - Miriam Louisa Rothschild (1908–2005), Britanyalı entomolog
 - Walter Rothschild, 2nd Baron Rothschild (1868–1937), Britanyalı zoolog
 - William Roxburgh (1759–1815), İskoç botanikçi
 - Adriaan van Royen (1704–1779), Hollandalı botanikçi (abbr. in botany: Royen)
 - Karl Rudolphi (1771–1832), Alman physiologist
 - Eduard Rüppell (1794–1884), Alman doğabilimci


## S.
### Sa-So.
 - Joseph Sabine (1770–1837), İngiliz doğa bilimci 
 - Julius von Sachs (1832–1897), Alman botanikçi
 - Étienne Geoffroy Saint-Hilaire (1772–1844), Fransız doğabilimci
 - Isidore Geoffroy Saint-Hilaire (1805–1861), Fransız zoolog
 - Carl Ulisses von Salis-Marschlins (1762–1818), Swiss doğabilimci interested in botany, entomology, and conchology
 - Edward James Salisbury (1886–1978), Britanyalı botanikçi
 - Richard Anthony Salisbury (1761–1829), Britanyalı botanikçi
 - Jonas Salk (1914–1995), Amerikalı biyolog, inventor of polio vaccine
 - Robert Sapolsky (1957), Amerikalı neuroscientist
 - Georg Ossian Sars (1837–1927), Norwegian marine biyolog
 - Michael Sars (1809–1869), Norwegian taxonomist
 - William Saunders (1822–1900), Amerikalı botanikçi
 - Horace-Bénédict de Saussure (1740–1799), Swiss doğabilimci
 - Marie Jules César Savigny (1777–1851), Fransız zoolog
 - Thomas Say (1787–1843), Amerikalı doğabilimci
 - George Schaller (1933), Amerikan zoolog, widely considered the preeminent field biyolog of the 20th century
 - Friedrich Schlechter (1872–1925), Alman botanikçi
 - Hermann Schlegel (1804–1884), Alman ornitolog
 - Matthias Jakob Schleiden (1804–1881), Alman co-founder of the cell theory
 - George Schoener (1864–1941), Alman-Amerikalı botanikçi
 - Johann David Schoepf (1752–1800), Alman botanikçi and zoolog
 - Heinrich Wilhelm Schott (1794–1865), Alman botanikçi
 - Johann Christian Daniel von Schreber (1739–1810), Alman doğabilimci
 - Leopold von Schrenck (1826–1894), Russo-Alman zoolog
 - Charles Schuchert (1858–1942), paleontologist
 - Theodor Schwann (1810–1882), Alman physiologist
 - Georg August Schweinfurth (1836–1925), Alman botanikçi
 - Philip Sclater (1829–1913), İngiliz zoolog
 - Giovanni Antonio Scopoli (1723–1788), İtalyan-Austrian doğabilimci
 - Henry Seebohm (1832–1895), İngiliz ornitolog
 - Prideaux John Selby (1788–1867), İngiliz botanikçi and ornitolog
 - Nikolai Alekseevich Severtzov (1827–1885), Rus doğabilimci
 - Richard Bowdler Sharpe (1847–1909), İngiliz zoolog
 - George Shaw (1751–1813), İngiliz botanikçi and zoolog
 - George Ernest Shelley (1840–1910), İngiliz ornitolog
 - Sir Charles Scott Sherrington (1857–1922), Britanyalı physiologist and neuroscientist, winner of the 1932 Nobel Prize in Physiology or Medicine for his research on neurons
 - Philipp Franz von Siebold (1796–1866), Alman botanikçi
 - George Gaylord Simpson (1902–1984), Amerikalı paleontologist
 - Rolf Singer (1906–1994), Alman d. mycologist
 - John Kunkel Small (1869–1938), Amerikalı botanikçi (abbr. in botany: Small)
 - Andrew Smith (1797–1872), İskoç zoolog
 - Edgar Albert Smith (1847–1916), Britanyalı zoolog and conchologist
 - Frederick Smith (1805–1879), Britanyalı entomolog
 - James Edward Smith (1759–1828), İngiliz botanikçi (abbr. in botany: Sm.)
 - Johannes Jacobus Smith (1867–1947), Hollandalı botanikçi (abbr. in botany: J.J.Sm.)
 - James Leonard Brierley Smith (1897–1968), South African ichthyologist
 - John Maynard Smith (1920–2004), biyolog
 - John Otterbein Snyder (1867–1943), Amerikan zoolog
 - Solomon H. Snyder (1938), Amerikalı neuroscientist, co-discovered endorphins
 - Daniel Solander (1733–1782), Swedish botanikçi
 - Louis François Auguste Souleyet (1811–1852), Fransız zoolog


### Sp-Sy.
 - Douglas Spalding (c1840–1877), İngiliz biyolog, discovered imprinting and conducted some of the earliest research on animal behavior
 - Lazzaro Spallanzani (1729–1799), İtalyan biyolog
 - Anders Sparrman (1748–1820), Swedish doğabilimci
 - Walter Baldwin Spencer (1860–1929), İngiliz biyolog and anthropologist
 - Roger W. Sperry (1913–1994), Amerikalı neuropsychologist, winner of the 1981 Nobel Prize in Physiology or Medicine for his split-brain research
 - Maximilian Spinola (1780–1857), entomolog
 - Johann Baptist von Spix (1781–1826), Alman doğabilimci
 - Herman Spoering (1733–1771), Finnish botanikçi
 - Kurt Sprengel (1766–1833), Alman botanikçi
 - Stewart Springer (1906–1991), Amerikalı ichthyologist noted for expertise in shark classification, behavior, and distribution of species
 - Richard Spruce (1817–1893), İngiliz botanikçi
 - Agustín Stahl (1842–1917), Porto Rikolu zoolog ve botanikçi
 - Edward Stanley, 13th Earl of Derby (1775–1851), İngiliz doğa bilimci 
 - Japetus Steenstrup (1813–1897), Danimarkalı zoolog
 - Franz Steindachner (1834–1919), Austrian zoolog
 - Leonhard Hess Stejneger (1851–1943), Norwegian zoolog
 - Georg Wilhelm Steller (1709–1746), Rus ornitolog
 - James Francis Stephens (1792–1853), İngiliz zoolog
 - Kaspar Maria von Sternberg (1761–1838), Bohemian botanikçi
 - Karl Stetter (1941), Alman microbiyolog
 - Nettie Maria Stevens (1861–1912), Amerikalı biyolog
 - Edward Charles Stirling (1848–1919), Australian anthropologist
 - Gerald Stokell (1890–1972), Yeni Zelandalı horticulturist and ichthyologist
 - Gottlieb Conrad Christian Storr (1749–1821), Alman doğabilimci
 - Eduard Strasburger (1844–1912), Alman botanikçi (abbr. in botany: Strasb.)
 - Erwin Stresemann (1889–1972), Alman ornitolog
 - John Struthers (1823–1899), İskoç anatomist
 - Samuel Stutchbury (1798–1859), İngiliz doğa bilimci and geologist
 - Carl Jakob Sundevall (1801–1875), Swedish zoolog
 - Mriganka Sur (1953), Indian cognitive neuroscientist specializing in neuroplasticity
 - Henry Suter (1841–1918), Yeni Zelandalı zoolog, doğabilimci and palaeontologist
 - William John Swainson (1789–1855), İngiliz ornitolog, malacologist, conchologist, entomolog and artist
 - Jan Swammerdam (1637–1680), Hollandalı biyolog and microscopist
 - Olof Swartz (1760–1816), Swedish botanikçi (abbr. in botany: Sw.)
 - Robert Swinhoe (1836–1877), İngiliz doğa bilimci 
 - Colonel W. H. Sykes (1790–1872), İngiliz ornitolog


## T.
 - Wladyslaw Taczanowski (1819–1890), Polish zoolog
 - Armen Takhtajan (d. 1910), Rus botanikçi
 - Peter Gustaf Tengmalm (1754–1803), Swedish doğabilimci
 - Coenraad Jacob Temminck (1778–1858), Hollandalı zoolog
 - Theophrastus (372 BC – 287 BC), biyolog and the successor of Aristotle in the Peripatetic school, popularizer of science
 - Johannes Thiele (1860–1935), Alman zoolog and malacologist
 - Michael Rogers Oldfield Thomas (1858–1929), Britanyalı zoolog
 - William Thompson (1805–1852), İrlandalı Ornithologist, deniz biyoloğu ve doğa tarihçisi
 - Louis-Marie Aubert du Petit-Thouars (1758–1831), Fransız botanikçi
 - Carl Peter Thunberg (1743–1828), Swedish doğabilimci
 - Samuel Tickell (1811–1875), Britanyalı ornitolog
 - Niko Tinbergen (1907–1988), Hollandalı ethologist
 - Agostino Todaro (1818–1892), İtalyan botanikçi
 - Susumu Tonegawa (d. 1939), Japanese biyolog, winner of the 1987 Nobel Prize in Physiology or Medicine for "discovery of the genetic principle for generation of antibody diversity"
 - John Torrey (1796–1873), Amerikalı botanikçi, first professional in New World
 - Joseph Pitton de Tournefort (1656–1708), Fransız botanikçi
 - John Kirk Townsend (1809–1851), Amerikalı ornitolog
 - Thomas Stewart Traill (1781–1862), İskoç doctor and doğabilimci
 - Abraham Trembley (1710–1784), Swiss doğabilimci
 - Melchior Treub (1851–1910), Hollandalı botanikçi
 - Henry Baker Tristram (1822–1906), İngiliz ornitolog
 - Robert Trivers (d. 1943), evolutionary biyolog
 - Édouard Louis Trouessart (1842–1927), Fransız doğabilimci
 - Frederick W. True (1858–1914), Amerikalı doğabilimci
 - George Washington Tryon Jr. (1838–1888), Amerikalı malacologist
 - Bernard Tucker (1901–1950), İngiliz ornitolog
 - Edward Tuckerman (1817–1886), Amerikalı botanikçi
 - Endel Tulving (d. 1927), Estonian-born Canadian neuroscientist, specializes in episodic memory
 - Marmaduke Tunstall (1743–1790), İngiliz ornitolog
 - Ruth Turner (1915–2000), marine biyolog
 - William Turton (1762–1835), Britanyalı doğabilimci


## U.
  - Jakob von Uexküll (1864–1944), Estonian biyolog, founder of biosemiotics


## V.
 - Martin Vahl (1749–1804), Norwegian botanikçi
 - Sebastien Vaillant (1669–1722), Fransız botanikçi
 - Achille Valenciennes (1794–1865), Fransız zoolog
 - Francisco Varela (1946–2001), Chilean biyolog
 - Nikolai Vavilov (1887–1943), Soviet botanikçi and geneticist, died in prison as a defender of "bourgeois pseudoscience" genetics against Lysenkoism
 - Damodaran M. Vasudevan (d. 1942), Indian physician, immunologist and educationist
 - Craig Venter (d. 1946), Amerikalı biyolog and businessman
 - Edouard Verreaux (1810–1868), Fransız doğabilimci
 - Jules Verreaux (1807–1873), Fransız botanikçi and ornitolog
 - Addison Emery Verrill (1839–1926), Amerikan zoolog
 - Louis Jean Pierre Vieillot (1748–1831), Fransız ornitolog
 - Nicholas Aylward Vigors (1785–1840), Irish zoolog
 - Rudolf Virchow (1821–1902), Alman biyolog and pathologist, founder of cell theory
 - Oswaldo Vital Brazil (1865–1950), Brezilyalı physician and immunobiyolog, discoverer of several antivenoms against snake, scorpion and spider bites
 - Bert Vogelstein (d. 1949), Amerikalı geneticist
 - Karel Voous (1920–2002), Hollandalı ornitolog
 - Mary Voytek, Amerikalı biogeochemist and microbial ecologist
 - Hugo de Vries (1848–1935), Hollandalı botanikçi


## W.
 - Frans de Waal (d. 1948), Hollandalı-Amerikalı etolog ve primatolog
 - Coslett Herbert Waddell (1858–1919), Irish botanikçi
 - Jeremy Wade (d. 1960) Writer and TV presenter with a special interest in rivers and freshwater fish.
 - Johann Georg Wagler (1800–1832), Alman herpetologist
 - Warren H. Wagner (1920–2000), Amerikalı botanikçi
 - Göran Wahlenberg (1780–1851), Swedish doğabilimci
 - Selman Waksman (1888–1973), Amerikalı biochemist, winner of the 1952 Nobel Prize in Physiology or Medicine for his work on antibiotics
 - Charles Athanase Walckenaer (1771–1852), Fransız entomolog
 - George Wald (1906–1997), Amerikalı biyolog, winner of the 1967 Nobel Prize in Physiology or Medicine for his work on visual perception
 - Alfred Russel Wallace (1823–1913), Britanyalı doğabilimci and biyolog
 - Nathaniel Wallich (1786–1854), Danimarkalı botanikçi
 - Benjamin Dann Walsh (1808–1869), Amerikalı entomolog
 - William Grey Walter (1910–1977), Amerikalı neurophysiologist and roboticist, made a number of important discoveries in the field of electroencephalography
 - Deepal Warakagoda (d. 1965), Sri Lankan ornitolog
 - J. Robin Warren (d. 1937), Australian pathologist, winner of the 2005 Nobel Prize in Physiology or Medicine for his discovery that most stomach ulcers are caused by a strain of bacteria
 - Charles Waterton (1782–1865), İngiliz doğa bilimci 
 - James D. Watson (d. 1928), Nobel Prize-winning biyolog, co-discoverer of the structure of the DNA molecule
 - Philip Barker Webb (1793–1854), İngiliz botanikçi (abbr. in botany: Webb)
 - Hugh Algernon Weddell (1819–1877), İngiliz botanikçi (abbr. in botany: Wedd.)
 - Robert Weinberg (d. 1942), Amerikalı cancer biyolog
 - August Weismann (1834–1914), Alman biyolog
 - Friedrich Welwitsch (1806–1872), Austrian botanikçi
 - Karl Wernicke (1848–1905), Alman physician and neuroanatomist, discovered Wernicke's area
 - Victor Westhoff (1916–2001), Hollandalı botanikçi
 - Alexander Wetmore (1886–1978), Amerikalı ornitolog
 - William Morton Wheeler (1865–1937), Amerikalı entomolog and myrmecologist
 - Gilbert White (1720–1795), İngiliz doğa bilimci 
 - John White (c. 1756–1832), İngiliz botanikçi
 - Robert Wiedersheim (1848–1923), Alman anatomist.
 - Prince Alexander Philipp Maximilian zu Wied-Neuwied (1782–1867), Alman explorer and biyolog.
 - Hans Wiehler (1930–2003), Amerikalı botanikçi (abbr. in botany: Wiehler)
 - Eric F. Wieschaus (d. 1947), Amerikalı developmental biyolog and 1995 Nobel Prize-winner
 - Torsten Wiesel (d. 1924), Swedish-born Amerikalı neurobiyolog, winner of the 1981 Nobel Prize in Physiology or Medicine for his research on information processing in the visual system
 - Charles Wilkes (1798–1877), Amerikalı explorer and doğabilimci
 - Carl Ludwig Willdenow (1765–1812), Alman botanikçi and pharmacist (abbr. in botany: Willd.)
 - George C. Williams (d. 1926), Amerikalı evolutionary biyolog, credited with introducing the gene-centric view of evolution
 - Francis Willughby (1635–1672), İngiliz ornitolog and ichthyologist
 - Alexander Wilson (1766–1813), İskoç-Amerikalı ornitolog
 - David Sloan Wilson (d. 1949), Amerikalı evolutionary biyolog
 - E. A. Wilson (1872–1912), İngiliz doğa bilimci 
 - Edward O. Wilson (d. 1929), Amerikalı entomolog and father of sociobiology, two time winner of the Pulitzer Prize
 - Sergei Winogradsky (1856–1953), Rus mikrobiyolog, ecologist and soil scientist who pioneered the cycle of life concept and discovered the biological process of nitrification
 - Caspar Wistar (1761–1818), Amerikalı anatomist and physician. The genus "Wisteria" is named after him
 - Henry Witherby (1873–1943), Britanyalı ornitolog
 - William Withering (1741–1799), İngiliz botanikçi
 - Carl Woese (d. 1928), Amerikalı microbiyolog, identified the Archaea, a major division of organisms
 - Felisa Wolfe-Simon, Amerikalı biogeochemist and microbial geobiyolog
 - Wong Siew Te (d. 1969), Malezyalı zoolog and Sun Bear expert
 - Flossie Wong-Staal (1947-2020), Amerikalı virolog
 - Sewall Wright (1889–1988), Amerikalı geneticist, co-founder of population genetics
 - V. C. Wynne-Edwards (1906–1997), İskoç zoolog, introduced the hypothesis of group selection in evolution
 - Charles Wyville Thompson (1832–1882), İskoç marine biyologist


## X.
 - John Xantus de Vesey (1825–1894), Amerikalı hayvanbilimci


## Y.
  - William Yarrell (1784–1856), İngiliz doğabilimci


## Z.
 - Floyd Zaiger (1926), meyve genetikçi
 - Eberhard August Wilhelm von Zimmermann (1743–1815), Alman zoolog
 - Karl Alfred von Zittel (1839–1904), Alman paleontolog
 - Joseph Gerhard Zuccarini (1797–1848), Alman botanikçi
 - Margarete Zuelzer (1877–1944), Alman biyolog ve zoolog