OK. I've resisted long enough. Here's one version of the ubiquitous bear joke:

In light of the rising frequency of bear-human encounters, the National Park Service is advising hikers to take extra precautions. The Service suggests that hikers remain on the trails and wear little bells on their clothing, so as not to startle bears that are not expecting them. The service also suggests that outdoorsmen carry pepper spray with them in case of an encounter with a bear.

It is also a good idea to watch for fresh signs of bear activity. Outdoorsmen should recognize the difference between black bear and grizzly bear dung. Black bear dung is smaller and contains lots of berries and sometimes squirrel fur. Grizzly bear dung is larger, has little bells in it and smells like pepper.