Animal Diversity Web
http://animaldiversity.ummz.umich.edu/site/index.html
BiologyBrowser
http://www.biologybrowser.org/
Managed by BIOSIS, BiologyBrowser contains free, searchable resources
such as the Nomenclature Glossary for Zoology and the Zoological Record
Thesaurus. Also contains a science discussion forum and an
international science conference calendar and archive.
Center for Conservation Biology Network
http://conbio.net/
Electronic Zoo
http://netvet.wustl.edu/e-zoo.htm
Integrated Taxonomic Information System
http://www.itis.usda.gov/
International Field Guides
http://www.library.uiuc.edu/bix/fieldguides/main.htm
IUCN Red List of Threatened Species
http://www.iucnredlist.org/
Mammal Species of the World
http://nmnhgoph.si.edu/msw/
NCBI Entrez Taxonomy Homepage
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=Taxonomy
Science.gov: FirstGov for Science
http://www.science.gov/
Developed by a government interagency working group from 11 major
science agencies, this website includes information on biology.
Tree of Life
http://tolweb.org/tree/phylogeny.html