WILDLIFE WATCHING -- Here's another take on that spectacular wildlife watching opportunity posed in mid-September by the death of a bison 400 yards from a road in Yellowstone Park.

• Five grizzlies and five gray wolves challenged each other for three days as they jockeyed for a place at the dinner table.

In the YouTube video above, Deby Dixon -- who took a videography course at Spokane Falls Community College from S-R photographer Colin Mulvany -- captured an instructive wildlife moment as a wolf nips a yearling grizzly cub in the butt.

Wildlife biologists say this is not uncommon. An Alaska biologist described the same practice to me as he was explaining wolf behavior.

Wolves learn and survive by observing, testing the waters and pushing the limits. Even among grizzlies, wolves are quick enough to get away with murder.