What characteristic distinguishes a grizzly bear from a cinnamon black bear in the field?

Answer

The presence of a shoulder hump

The most definitive physical characteristic separating grizzlies from black bears (including cinnamon morphs) is the distinct muscle hump over the shoulders, which black bears lack entirely.

What characteristic distinguishes a grizzly bear from a cinnamon black bear in the field?
rarityanimalwildlifebearcinnamon bear