Sloth Bears - Brief information about Melursus ursinus.

International Association for Bear Research and Management - A non-profit organization of biologists and others working with bears. Site has bear descriptions by species.

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 Trust International - General information, habitat conservation and education projects.

Bear Research, Education, and Conservation Program - Washington State University site on bear research and management.