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How can American black bears be distinguished from true brown bears?
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bear
Grizzly bear in Jasper National Park, western Alberta, Canada.
American black bears (Ursus americanus) and true brown bears (Ursus arctos), which include the grizzly bear, can be distinguished by several physical characteristics, as color alone is an unreliable indicator.12
Key differences include:
- Size: True brown bears are significantly larger than American black bears.1
- Shoulder Profile: Grizzly bears are characterized by a distinctive hump on their shoulders, whereas black bears lack this feature.2
- Facial Profile: Brown bears typically have an elevated forehead that creates a somewhat concave facial profile. In contrast, black bears have a smaller head supported by a strong neck.21
- Claws: Black bears possess shorter, curved claws adapted for climbing trees. Brown bears have long, straight claws that make them less adept at climbing.12
While some black bears in western North America are brown in color and are occasionally mistaken for grizzlies, these physical structural differences remain the most reliable way to distinguish between the two species.12