Black wolves don’t occur naturally. A 2008 study at Stanford University found that the mutation responsible for black fur occurs only in dogs, so black wolves are the result of gray wolves breeding back with domestic canines.
A Mongolian wolf pup was born April at Zoo Zurich in Switzerland. Zoo keepers had prepared a den (with a hidden camera) for the first time wolf mother, but she used it for only several days. She soon took her pup to different dens the wolves h