Grizzly bear cubs weigh less than one pound when born. The average weight of a wlof is 60-100 pounds. The grizzly bear is a threatened species. Fourteen wolves were released in Yellowstone on March 21, 1995. Bears are not true hibernators.
Gray wolves can range in color from white to black.
For answers to these questions, contact the Grizzly Discovery Center. Bruce Smith has been tracking newborn elk for six years, with a study from 1990 through 1992 and another from 1997 through 1999. The first study, before grizzly bears became common in the area and wolves were reintroduced in Yellowstone National Park, revealed that coyotes and black bears were the main elk predators. The second study documented more calf kills by mountain lions and grizzly bears, and one calf killed by a wolf. But that does not reflect the real impact of wolves on the elk population, he said during a recent lecture.