Top level subcategories are: five Kingdoms plus Viruses.
The structure is organized according to a taxonomy tree.
Some subtaxons and taxon levels are intentionally omitted for:
1) escaping from "unstable" taxons;
2) ease in navigation;
3) convenience in editing.
A growing taxonomic database and information system that aims at documenting all presently known species (about 1.7 million). Taxonomic trees, descriptions, synonyms, literature citations, and molecular database queries. www.eti.uva.nl/Database
Large selection of pictures of organisms, mostly British in origin. Images are an aid to identification, showing different stages, states and views of the organisms. Search the database or follow a taxonomic tree. www.bioimages.org.uk
Dedicated to the beauty and science of nature and to the joys nature brings to those who explore it. The material here is organized according to the biological principles of Taxonomy. www.perspective.com/nature/index.html
Information about taxonomy, natural history, distribution, abundance, and ecology of many species worldwide. Includes tools to identify, map, and database species. www.discoverlife.org
Non-profit initiative of The Wildscreen Trust with photographs, movie clips, sound recordings, and brief desriptions of selected endangered and protected species of Britain and the rest of the world. www.arkive.org
Project to establish web-based databases of organisms and other natural sciences subjects. Includes information about some taxonomic groups. www.il-st-acad-sci.org/kingdoms.html
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. www.funet.fi/pub/sci/bio/life/intro.html
Includes the Index to Organism Names, a publicly available subset of TRITON the Taxonomy Resource, and the Zoological Record Thesaurus. www.biosis.org.uk/free_resources
Provides access to materials from the fish, mammal, and fungus collections of the University of Michigan, USA. Includes many images of specimens. www.lib.umich.edu/programs/greatlakes
Explores plant anatomy, taxonomy, and classification, from Monera through the higher plants. Includes descriptions as well as graphics and schematics. home.manhattan.edu/~frances.cardillo/plants/intro
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. www.coml.org
Information on the plants, animals, and fossils of Ireland. Includes an encyclopedia of marine life of the UK. From the Ulster Museum Sciences Division. www.habitas.org.uk
Database of photos and fact sheets for animals and plants occurring in this state. Includes lists of sensitive, threatened, and endangered species. dwrcdc.nr.utah.gov/ucdc
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