ITIS - Integrated Taxonomic Information System
Taxonomic information on plants, animals, fungi, and microbes of North America
Index to Organism Names
ION contains the organism names related data gathered from the scientific literature for Thomson Reuters' Zoological Record®
Tree of Life Web Project
Collection of species accounts linked by taxonomic order
Catalogue of Life
Catalogue of Life (COL) is a collaboration bringing together the effort and contributions of taxonomists and informaticians from around the world. COL aims to address the needs of researchers, policy-makers, environmental managers and the wider public for a consistent and up-to-date listing of all the world’s known species. COL also supports those who need to manage their own taxonomic information and species lists.
Biodiversity Heritage Library (BHL)
the world’s largest open access digital library for biodiversity literature and archives. BHL is revolutionizing global research by providing free, worldwide access to knowledge about life on Earth.
ZooBank
Official registry of zoological nomenclature
Amphibian Species of the World
Online taxonomic catalog, by the American Museum of Natural History
AnimalBase
Early zoological literature and original descriptions
Avibase
Taxonomic information on 10,000 species and 22,000 subspecies, from BirdLife International
Encyclopedia of Life
Species accounts, by leading natural history institutions, botanical gardens and libraries
Database for Reptile Taxonomy
Information on the classification of all living reptiles, listing all known species and pertinent higher taxa
Mammal Species of the World
Mammalian taxonomy database, by Wilson & Reeder (3rd ed.)
Birds of the World
Comprehensive life histories for all bird species and families with updates from leading ornithologists.
ZooBank
Official registry of zoological nomenclature
