Biology

Scholarly and up-to-date articles on the sciences and social sciences, illustrations and graphics, and bibliographies. Search either the Encyclopedia or the Science Dictionary for best results. Try the subject-specific study guides for background on a topic.

Birds of the World (BOW) content is written by leading ornithologists and was amassed from several celebrated works of ornithology: Birds of North America, The Handbook of Birds of the World, Neotropical Birds, Birds of Southern Africa, and Bird Families of the World. Contains illustrations, species accounts and more.