A bear was a type of animal native to Earth.
Bears were known to inhabit the wilderness areas of Washington. Biddy Cloom worried that Candy Pruitt and Jeremy Bolt could have been eaten by a bear. (TOS novel: Ishmael)
Joaquin Weiss wore a large brass belt buckle shaped like the head of a snarling grizzly bear, inside of which was hidden a knife. (TOS novel: The Rise and Fall of Khan Noonien Singh, Volume 2)