Coyotes are invading backyards across America. With sharp teeth, wily intelligence and a body built for speed, these formidable predators can adapt and survive in nearly any environment. They are a threat people as well as pets ' attacking a 19-year-old girl in Nova Scotia, stalking joggers in New Jersey and snatching a toddler right out of its sandbox in California. Worse yet, biologists have now uncovered a hybrid species that is larger and more aggressive ' the coywolf.
National Geographic WILD