Common Ravens are quite common in Yellowstone National Park. The Ravens are opportunists. Wherever food might be available, there they are. This is very likely one of the Ravens that scavenged the carcass of the Bison that we witnessed the Wapiti Lake Pack of wolves attack and kill on Monday. I photographed this Raven on Friday in the parking pullout, near where we stood to photograph the Gray Wolves on Monday. By Friday, the Wapitis had moved on and almost nothing was left at the kill site. A pair of Coyotes and a few Common Ravens scavenged what few remnants remained. This Raven was perched on a log fence surrounding the parking area, not at all concerned with our presence and he moved only his head to look around occasionally. Maybe he was thinking that we might be a source of food. We were not, but if you look closely, you can see our snow coach reflected in his eye and me standing in front of it photographing him. He was probably trying to figure out how to get into our snow coach to ransack it for any food we might have inside.