ARKive : Images of Life on Earth
An extensive collection of thousands of videos, images and fact-files illustrating the world's species gathered into one centralised digital library.
African Wildlife Photographs
Library of high resolution stock wildlife photographs by John Visser.
Taxonomic tree of plants and animals with a photo gallery and some checklists for the Czech Republic and Slovakia. In Czech and English.
Classification of all forms of life, with some photos. Has a strong South African emphasis.
Census of Marine Life
A global network of researchers engaged in a ten-year initiative to assess and explain the past, present, and future diversity, distribution, and abundance of marine life in the oceans.
Classification of Living Things
An introduction to the naming and relationships of living things. Classification involves much human judgement and is in a constant state of flux as new information is discovered.
Information about taxonomy, natural history, distribution, abundance, and ecology of many species worldwide. Includes tools to identify, map, and database species.
Encyclopedia of Life
A new project to create an online reference source and database for every one of the 1.8 million species that are named and known on this planet. Includes FAQ and press resources.
Integrated Taxonomic Information System
Authoritative taxonomic information on plants, animals, fungi, and microbes of North America and the world.
Lepidoptera and Other Life Forms
Taxonomic tree of mammals, insects, birds, and plants. Includes common and scientific names, publication details, references, links, general range maps, and some images. Most complete for Lepidoptera.
Mikko's Phylogeny Archive
A compilation of various phylogenetic trees representing different views of taxonomy. Includes links to other taxonomic websites.
Searchable and browsable taxonomy tree of organisms for which there are publicly available gene sequences.
Tree of Life Web Project
Collaborative effort of biologists from around the world, providing information about the diversity of organisms on Earth, their evolutionary history (phylogeny) and characteristics.
Wikimedia Foundation project that aims to catalog all species.
Willi Hennig Society
Society of cladisticians, publishes the journal "Cladistics"
World Register of Marine Species
WoRMS aims to provide an authoritative and comprehensive list of names of marine organisms, including information on synonymy.
World's Boreal Forests: Animal and Plant Species
Fact sheets and photos for mammals, birds, trees and other plants of boreal regions.
i Go Terra
Database covering the flora and fauna of the world with a checklist for each country.
Site and community for reporting personal observations of any plant or animal species in the world.
A species search engine from Rod Page of Glasgow University. Search on either the common or Latin name of a species. Results are generated by querying other data sources.