Library of high resolution stock wildlife photographs by John Visser.

Classification of all forms of life, with some photos. Has a strong South African emphasis.

Taxonomic tree of plants and animals with a photo gallery and some checklists for the Czech Republic and Slovakia. In Czech and English.

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.

Information about taxonomy, natural history, distribution, abundance, and ecology of many species worldwide. Includes tools to identify, map, and database species.

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.

Information on the plants, animals, and fossils of Ireland. Includes an encyclopedia of marine life of the UK. From the Ulster Museum Sciences Division.

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.

Photos, facts, and links to information about birds, butterflies, mammals, and wildflowers of this region.

Society of cladisticians, publishes the journal "Cladistics"

WoRMS aims to provide an authoritative and comprehensive list of names of marine organisms, including information on synonymy.