AnimalWeb: Site introduces taxonomy terms and has a definition for each (phylum, sub-phylum, class, order, family and species); under the Ursidea (bear) family a page for each species is provided.
Bear Research, Education, and Conservation Program: Washington State University site on bear research and management.
Bear Taxon Advisory Group Educational Site: Official website of the AZA's conservation subcommittee for the conservation of bears, with information about the eight species of bears.
Bear Trust International: General information, habitat conservation and education projects.
International Association for Bear Research and Management: A non-profit organization of biologists and others working with bears. Site has bear descriptions by species.