The swift fox (Vulpes velox) is a small, agile canid native to the grasslands of the central United States and southern Canada. Named for its speed, it has a pale yellowish-tan coat, a black-tipped bushy tail, and large ears. Weighing only 4 to 6 pounds, the swift fox is one of the smallest wild canids in North America. It is nocturnal and prefers open prairies, where it hunts rodents, insects, birds, and eats fruit. Swift foxes live in dens year-round and often form monogamous pairs. Once nearly extinct due to habitat loss and poisoning, they have made a comeback through conservation efforts.