Wolves boost food for Yellowstone’s Grizzlies
Wolves and grizzlies aren’t best buddies. Burly bears can barge in on a feasting pack, making off with the wolves’ fresh kill. Wolves have been known to dig into bear dens and snag a cub.
But after gray wolves returned to Yellowstone National Park in 1995, grizzly bears ate more berries in the summer for a pre-hibernation nutritional boost, researchers reported Sept. 4 in the Journal of Animal Ecology.