Grizzly Bears feeding on Bison carcass

These two Grizzlies were on a very distant hillside (so, fully zoomed and very heavily cropped and obviously posted for interest, not technical quality). At least you can tell that they were Grizzlies - they were feeding on a Bison carcass, along with Common Ravens (though a lady standing near me insisted that they were Vultures, which they most definitely weren't, lol). These Bears returned on other days, too. Some of the time, one Grizzly would be feeding and the other would approach fairly closely and then disappear, coming back a short time later, and then repeating the process. On the one day, we also saw a Wolf approach the Bears and manage to get a mouthful or two - will post another photo later that shows the Wolf there, too, just for the record that we were so lucky to see Grizzlies and a Wolf..