Chuffs and Bluffs

From the USGS Northern Divide Grizzly Bear Project:

“A wolf feeds on a road-killed elk carcass in the morning. A grizzly bear with two cubs feeds on the carcass in the evening. A grizzly bear will chuff and pop its jaw when it feels threatened. Sometimes it will also charge at the threat, usually veering off or stopping short – a bluff charge. Early the next morning a grizzly bear with cubs chuffs and bluff charges a wolf. The wolf appears to be alone and, at times, postures as if it is playing. Video camera was triggered by a motion sensor.”

Want to see more?  Video archives for the project are available here.