Human Interaction Leads to Euthanization of Yellowstone Bison Calf

A bison calf at Yellowstone National Park had to be euthanized after a man apparently tried to help it, causing the herd to reject it, park officials said this week. The newborn calf began following cars and people, officials said, and was killed because it posed a hazard to visitors. The National Park Service is seeking information on the man who interacted with the calf, and park regulations require visitors to stay 25 yards away from wildlife such as bison, elk, and deer and 100 yards away from bears and wolves.