[Lonesome in Massachussets]

The grizzly bear (Ursus arctos ssp.) is any North American subspecies of the brown bear, including the mainland grizzly (Ursus arctos horribilis), the Kodiak bear (Ursus arctos middendorffi), the peninsular grizzly (Ursus arctos gyas) and the recently extinct California grizzly (U. a. californicus)[1] and Mexican grizzly bear (U. a. nelsoni).

http://en.wikipedia.org/wiki/Grizzly_bear

Brown bears are the aggressive variety. Black bears are just oversized raccoons. Raccoons can bite, of course.

[canuck_conservative]

Black bears are just oversized raccoons.

Raccoons can't take your head off with one swipe of the paw.

[Mike Darancette]

The California grizzly was said to be the meanest of the lot with longer legs and a real bad attitude.