Ursidae, the Bear Family, is divided into three subfamilies, Ursinae (black bears, brown bears, polar
bears, sloth bears, and sun bears), Tremarctinae (spectacled bears), and Ailuropodinae (giant pandas).
Official website of the AZA's conservation subcommittee for the conservation of bears, with information about the eight species of bears. www.bearden.org
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. www.animalweb.com/animalworld/family-ursidae.asp