Asian black bear
Along with sun bears, Asiatic black bears are the most typically used species in areas where bears are either used in performances or as pets. Asian black bears have an outstanding learning ability in captivity, and are among the most common species used in circus acts. According to Gary Brown:
Brown bear
The brown bear ("Ursus arctos") is a bear that is found across much of northern Eurasia and North America. In North America the population of brown bears are often called grizzly bears. It is one of the largest living terrestrial members of the order Carnivora, rivaled in size only by its closest relative, the polar bear ("Ursus maritimus"), which is much less variable in size and slightly larger on average.