Bears Ecofact: Brown, Polar, and Black Bears of North America

The genus Ursus contains 4 species of bear, the polar bear, the brown bear, the american black bear and the asiatic black bear. All but the asiatic black bear can be found in one special place in Alaska - the Yukon Delta National Wildlife Refuge. Find out more about the bears in the genus Ursus at UntamedScience.com.