A searchable, selective index of related internet resources, including subjects such as biodiversity and biological informatics...

Endangered species of plants and animals in a database, searchable by status, country, habitat, year of assessment, marine region, major threat type, taxonomic, common name...

Database of still photos, video and audio clips, and links to websites about animals of all kinds...

Tables, arranged taxonomically, showing the greatest known ages for both wild and captive mammals, birds, amphibians, reptiles, and fish...

Database of "information on more than 65,000 plants, animals, and ecosystems of the United States and Canada," including particularly in-depth coverage for rare and endangered species...

"A broad, collaborative program to provide increased access to data and information on the nation's biological resources; the NBII links diverse, high-quality biological databases, information products, and analytical tools maintained by NBII partners and other contributors in government agencies, academic institutions, non-government organizations, and private industry...

Provides "a systematic account of every family, covering their form and function, distribution, diet, social behaviour, and breeding biology...

Illustrated overview of reptiles and amphibians...

More than 30,000 digitized, public-domain images from books, magazines, postcards, and other sources...

Includes detailed descriptions, images, and distribution ranges for more than 400 mammals native to the North American continent from The Smithsonian Book of North American Mammals, Mammals of North America, and the National Museum of Natural History...

Maintained by the Wisconsin Regional Primate Research Center, this site offers many primatology-related resources, including audio-visual materials, fact sheets, and the PrimateLit database, which indexes related scientific literature from 1940 to the present...

The SORA project is an open access electronic journal archive and is the product of a collaboration between the American Ornithologists Union, the Cooper Ornithological Society, the Association of Field Ornithologists, the Wilson Ornithological Society and the University of New Mexico libraries and IT department...

Information on endangered species in the United States, provided by the governmental agency that deals most directly with the problem...

"This database is intended to provide information on the classification of all living reptiles by listing all species and their pertinent higher taxa...

A "collection of information about biodiversity compiled collaboratively by hundreds of expert and amateur contributors...

A map-driven, searchable database of more than 26,000 species of birds, mammals, reptiles, and amphibians worldwide...

"ETI's World Biodiversity Database is a continuously growing taxonomic database and information system that aims at documenting all presently known species (about 1...

Photographs of birds of the world, arranged in taxonomic order: order-family-species...

Database containing well over a million zoological names...

Searchable full-text journals covering various years from the 1990s to the present...