BIRDS
•  Tree of Life Aves or Modern Birds
•  BIRDNET (ornithological societies & resources)
•  Handbook of Birds of the World
•  Project VIREO (5000+ species of birds in color)
•  Cornell Laboratory of Ornithology
•  Smithsonian Institution, Division of Birds
•  Tracy Aviary (Salt Lake City, Utah)
•  The Virtual Birder

INSECTS (especially lice)
•  Tree of Life Insecta
•  Tree of Life Phthiraptera (Lice)
•  Tree of Life Mallophaga (Chewing Lice)

EVOLUTION
•  Tree of Life
•  Phylogenetic Software Programs
•  National Center for Biotechnology Information
•  ActionBioscience.org
•  Society for the Study of Evolution

CONSERVATION
•  National Audubon Society
•  The Nature Conservancy
•  U.S. Fish and Wildlife Service
•  Hawkwatch International