The home range of the coyote is rarely ten miles across, except on the margin of mountains where sometimes it is twice this. In many localities a pair will have three or four square miles to themselves; in other localities there are a few pairs to the square mile. Coyotes probably mate for life. A pair commonly hunt together, though each often hunts alone. They are said to live from eight to fifteen years. I kept track of one for eight years, who appeared mature when I first met him and showed no signs of decay when I saw him last. The coyote usually lies up in a den when not hunting; but at times he simply hides in underbrush or in ravines. A den I measured lay nearly four feet below the surface and had a length of fourteen feet. It was expanded into a room-like place near the farther end and there were a number of small pockets extending from it. The den may be made by the coyotes themselves or it may be the den of a badger which they have re-shaped. Occasionally they take advantage of cave-like places between large stones. The den commonly is in an out-of-the-way place and the entrance to it is concealed by stones or bushes. Coyotes often have three or more dens. A change is probably helpful in keeping down parasites, and I am certain that their use of more than one den confuses and defeats their pursuers. Many a man has dug into a coyote’s den and found it empty when only the day before he had seen it used by the entire family. The young are born in April or May, in litters of from five to ten. They grow rapidly and in a few weeks show all the cunning ways and playfulness of puppies. When safe they spend hours outside the den, wrestling, digging, or sleeping in the sun. In two dens I examined each youngster had a separate compartment or pocket for himself; and, judging from claw marks, probably he had dug this himself. In July the youngsters are taken out into the world, where they learn the tactics of wresting a living from the fields. The coyote is a swift runner and easily outstrips the gray wolf. The average horse cannot catch him and probably the greyhound is the only dog that can overtake him. Swift as he is, however, the jack rabbit and the antelope leave him behind. Coyotes often hunt in pairs and occasionally in packs. When hunting in pairs one will leisurely hunt, or pretend to be hunting, in plain view of a prairie dog or other animal. While this active coyote holds the attention of the victim the other slips close and rushes or springs upon it. They often save their legs and their lives with their brains; they succeed by stealth instead of sheer physical endurance. Antelopes, rabbits, and other animals are frequently captured by several coyotes taking part in the chase. Commonly they scatter in a rude circle and run in relays. Those near the place toward which the animal is running lie in concealment close to its probable course. As the victim weakens all unite to pull it down and are present at the feast.