wild wolf, wild gray wolf, wild wolves, wild gray wolves, Canis lupus, Gray Wolf, Gray Wolves, North America, Rocky Mountains, Western U.S., Wild, Wolf, Wyoming, Yellowstone, Yellowstone National Park, Greater Yellowstone area, Greater Yellowstone Ecosystem, animal, animals, behavior, carnivore, carnivores, fauna, grey wolf, group, horizontal, idaho, mammal, mammals, montana, pack, predator, predators, several, timber Wolf, timber wolves, wolves, snow, forest, 2, two, photo, photos, photograph, photographs, image, images, picture, pictures, stock, of, agency leesonphoto