Cornell University Museum of Vertebrates: Educational and research resource with sections on ichthyology, herpetology, ornithology and mammalogy.
Infrared Zoo: Uses infrared photography to show the differences between warm and cold blooded animals.
Museum of Vertebrate Zoology: Provides specimen data and archival materials from the collections of the University of California, Berkeley.
Museum of Vertebrate Zoology Collections: Searchable database of specimens that includes over 50,000 tissue samples for use in molecular analyses.
Society for Northwestern Vertebrate Biology: Devoted to the study of terrestrial vertebrates in the Pacific northwest. Offers publications and reference data.
Will's Skull Page: Features images and measurements of mammalian skulls as well as updates and related links.