The coyote is a member of the dog family. In size and shape the coyote is like a medium-sized Collie dog, but its tail is round and bushy and is carried straight out below the level of its back. One of the most adaptable animals in the world, the coyote can change its breeding habits, diet and social dynamics to survive in a wide variety of habitats. Alone, in pairs or in packs, coyotes maintain their territories by marking them with urine. They also use calls to defend this territory, as well as for strengthening social bonds and general communication. Coyotes can easily leap an 8 foot fence or wall. They have been spotted climbing over a 14 foot cyclone fence. Although the coyote usually digs its own den, it will sometimes enlarge an old badger hole or perhaps fix up a natural hole in a rocky ledge to suit its own needs. Dens are usually hidden from view, but they are fairly easy to locate because of the trails that lead away from the den. The coyote uses the den to birth its young and to sleep. The coyote does not hibernate. Coyotes have a good sense of smell, vision and hearing which, coupled with evasiveness, enables them to survive both in the wild and occasionally in the suburban areas of large cities. They are common in most rural areas, but because of their secretive nature, few are seen. Efforts to control or exterminate the Coyote by predator control agents seem to have produced an animal that is extremely alert and wary and well able to maintain itself.