beaver, beavers, american beaver, american beavers, work, working, hard work, teeth, bite, cottonwood tree, mammal, mammals, animals, rodents, rodent, animal, wildlife, fauna, wyoming wildlife, wetland wildlife, horizontal, castor canadensis, precision, wildlife, wetland, cottonwood, western U.S., Grand Teton National Park, North America, wyoming, fall, photo, photos, photograph, photographs, image, images, picture, pictures, stock, agency, leesonphoto, behavior