BioMedNet - online club for biological and medical scientists. Biophilia - for people interested in biology. Estonian Naturalists' Society Hawaii Biological Survey - an ongoing natural history inventory of the Hawaiian Archipelago. Heraclitean Biology Group - an international group of biologists interested in stochastic and selective models. Students are welcome.
Site provides a bibliographic database and a forum of discussion.
Histochemical Society - organization of scientists founded in 1950 devoted to the study of cell and tissue biology with molecular and morphological techniques. Linnean Society of London - promotes all aspects of biology, but particularly those concerning the diversity and interrelationships of organisms. Oxygen Club of California - topics of interest include free radicals in biological systems, in chemistry and in medicine. Photobiology Online - A wealth of information on the effects of light on biological systems, jointly presented by the European and American Societies for Photobiology. Society of Cal Integrative Biology Undergraduate Students - provides links and resources to many biology related fields.