Grizzly Bear Main Menu Common Traits Polar Bear Black Bear Grizzly Bear Ursus Arctos Horribilis Physical Characteristics Color varies from blond to black. Average weight is 350 pounds for males and 275 for females. Males may weigh up to 900 pounds. Distinctive shoulder hump is actually muscle mass that enables powerful digging. A dished-in profile between eyes and end of snout helps distinguish grizzlies from black bears.
Ears are round and proportionately small.
Front claws are 2-4 inches long, slightly curved, and good for digging. Claw marks are usually visible in tracks. Behavior Usually more aggressive than black bears. Females use size and strength to protect cubs. Mostly active between dusk and dawn, although grizzly bears can be active any time of day .