I saw this at the local Forest Service office a while back....

WARNING! When going into bear country one should always carry pepper-spray and wear cowbells. And when you are in bear country you need to know what species of bear you may encounter. In Black Bear country you will see small footprints with short claws, and occasionally a torn up bush. In Grizzly Bear country you will find large footprints, with long claws, and there will be stumps uprooted and torn apart. The easiest way to tell what bear you may encounter is by looking at the droppings. Black bear droppings have small bones, berry seeds, and sometimes fur. Grizzly bear droppings however have cowbells and smell like pepper spray! So PLEASE be careful!