The bear family (Ursidae) contains the largest terrestrial carnivores. Most taxonomists agree that there are eight extant species of bears in three subfamilies: Ursinae (American black, Asiatic black, brown, polar, Malayan Sun, and sloth bears); Tremarctinae (Andean or spectacled bear); and Ailuropodinae (giant panda). Bears currently inhabit North America, South America, Europe, and Asia. Habitats range from polar ice floes to tropical forests. They are absent from Australia, Africa, and Antarctica.