Bobcats thrive at Gila Cliff Dwellings National Monument in New Mexico but are rarely seen. Mostly nocturnal, they use stealth and excellent night vision to hunt small mammals in darkness. Bobcats are usually tawny with darker spots and streaks on their body and legs, and light-colored undersides. They have short black tufts on their ears and a ruff of longer fur on their face. The kittens may look like ordinary house cats, but they quickly grow to twice the size of domestic cats. Photo by National Park Service.