Context: Puffinus is a genus of seabirds in the order Procellariiformes . It comprises about 20 small to medium - sized shearwaters . Two other shearwater genera are named : Calonectris , which comprises three large shearwaters , and Procellaria with another four large species . The latter are usually called petrels , although they are thought to be more closely related to the shearwaters than to the other petrels . Despite the resemblance in the name , the puffins are auks , and completely unrelated to the shearwaters in the genus Puffinus ; the genus name Puffinus is actually a New Latin loanword based on the English `` puffin '' . The original Latin term for shearwaters was usually the catchall name for sea - birds , mergus . The taxonomy of this group is the cause of much debate , and the number of recognised species depends on the source . The species in this group are long - winged birds , dark brown or black above , and white to dark brown below . They are pelagic outside the breeding season . They are most common in temperate and cold waters . These tubenose birds fly with stiff wings , and use a shearing flight technique to move across wave fronts with the minimum of active flight . Some small species , such as the Manx shearwater , are cruciform in flight , with their long wings held directly out from their bodies . Many are long - distance migrants , perhaps most spectacularly the sooty and short - tailed shearwaters , which perform migrations of 14,000 km or more each year . Puffinus shearwaters come to islands and coastal cliffs only to breed . They are nocturnal at the colonial breeding sites , preferring moonless nights to minimise predation . They nest in burrows and often give eerie contact calls on their night - time visits . They lay a single white egg . They feed on fish , squid and similar oceanic food . Some will follow fishing boats to take scraps , notably the sooty shearwater ; these species also commonly follow whales to feed on fish disturbed by them ., Shearwaters are medium-sized long-winged seabirds. There are more than 30 species of shearwaters, a few larger ones in the genus "Calonectris" and many smaller species in the genus "Puffinus". The "Procellaria" petrels and "Bulweria" were believed to belong to this group, but are only distantly related based on more recent studies, while the "Pseudobulweria" and "Lugensa" "petrels" are more closely related. The genus "Puffinus" can be divided into a group of small species close to "Calonectris" and a few larger ones more distantly related to both., Binomial nomenclature (also called binominal nomenclature or binary nomenclature) is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin grammatical forms, although they can be based on words from other languages. Such a name is called a binomial name (which may be shortened to just "binomial"), a binomen or a scientific name; more informally it is also called a Latin name. The first part of the name identifies the genus to which the species belongs; the second part identifies the species within the genus. For example, humans belong to the genus "Homo" and within this genus to the species "Homo sapiens". The "formal" introduction of this system of naming species is credited to Carl Linnaeus, effectively beginning with his work "Species Plantarum" in 1753. But Gaspard Bauhin, in as early as 1623, had introduced in his book "Pinax theatri botanici" (English, "Illustrated exposition of plants") many names of genera that were later adopted by Linnaeus., In biology, an organism is any contiguous living system, such as an animal, plant, fungus, archaeon, or bacterium. All known types of organisms are capable of some degree of response to stimuli, reproduction, growth and development and homeostasis. An organism consists of one or more cells; when it has one cell it is known as a unicellular organism; and when it has more than one it is known as a multicellular organism. Most unicellular organisms are of microscopic scale and are thus loosely described as microorganisms. Humans are multicellular organisms composed of many trillions of cells grouped into specialized tissues and organs., Bulweria is a genus of seabirds in the family Procellariidae named after English naturalist James Bulwer. The genus has two extant species, Bulwer's petrel ("B. bulwerii") and Jouanin's petrel ("B. fallax"). A third species, the Olson's petrel ("Bulweria bifax"), became extinct in the early 16th century; it is known only from skeletal remains. Bulwer's Petrel ranges in the Atlantic, Indian and Pacific Oceans, whereas Joaunin's Petrel is confined to the northwestern Indian Ocean. Olson's Petrel is known from the Atlantic., Calonectris is a genus of seabirds. The genus name comes from Ancient Greek "kalos", "good" and "nectris", "swimmer"., A genus ( genera) is a taxonomic rank used in the biological classification of living and fossil organisms in biology. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus., Petrels are tube-nosed seabirds in the bird order Procellariiformes. The common name does not indicate relationship beyond that point, as "petrels" occur in three of the four families within that group (except the albatross family, Diomedeidae). Having a fossil record that was assumed to extend back at least 60 million years, the Procellariiformes was long considered to be among the older bird groupings, other than the ratites, with presumably distant ties to penguins and loons. However, recent research and fossil finds such as "Vegavis" show that the Galliformes (pheasants, grouse and relatives), and Anseriformes (ducks, geese) are still not fully resolved. , Pseudobulweria is a genus of seabirds in the family Procellariidae. They have long been retained with the gadfly petrel genus "Pterodroma" despite morphological differences. Mitochondrial DNA cytochrome "b" sequence analysis has confirmed the split out of "Pterodroma" and places the genus closer to shearwaters. They thus represent either a plesiomorphic lineage still sharing some traits of the ancestral Procellariidae with the gadfly petrels, or convergent evolution of a shearwater to the ecological niche of gadfly petrels., Procellaria is a genus of Southern Ocean long-winged seabirds related to prions, and within the order Procellariiformes. The Black Petrel ("Procellaria parkinsoni") ranges in the Pacific Ocean, and as far north as Central America. The Spectacled Petrel ("Procellaria consicillata") is confined to the Atlantic Ocean, and the Westland Petrel ("Procellaria westlandica") to the Pacific Ocean. The White-chinned ("Procellaria aequincotialis") and Grey Petrel ("Procellaria cinerea") range throughout the higher latitudes of the Southern Ocean., Subject: puffinus, Relation: parent_taxon, Options: (A) albatross (B) animal (C) anseriformes (D) bifax (E) bird (F) bulweria (G) calonectris (H) grouse (I) homo (J) procellaria (K) procellariidae (L) pseudobulweria (M) puffinus
Output: procellariidae