Coyotes typically grow up to 30–34 in (76–86 cm) in length, not counting a tail of 12–16 in (30–41 cm), stand about 23–26 in (58–66 cm) at the shoulder and, on average, weigh from 15–46 lb (6.8–21 kg) .[5][12] Northern coyotes are typically larger than southern subspecies, with the largest coyotes on record weighing 74¾ pounds (33.7 kg) and measuring over five feet in total length.[13]
Coyotes are opportunistic, versatile carnivores with a 90% mammalian diet, depending on the season. They primarily eat small mammals, such as voles, prairie dogs, eastern cottontails, ground squirrels, and mice, though they will eat birds, snakes, lizards, deer, javelina, and livestock, as well as large insects and other large invertebrates.
Packs of coyotes can bring down prey as large as adult elk, which usually weigh over 250 kg (550 lbs).[
Despite being extensively hunted, the coyote is one of the few medium-to-large-sized animals that has enlarged its range since human encroachment began. It originally ranged primarily in the western half of North America, but it has adapted readily to the changes caused by human occupation and, since the early 19th century, has been steadily and dramatically extending its range.
Coyotes also thrive in suburban settings and even some urban ones. A study by wildlife ecologists at Ohio State University yielded some surprising findings in this regard. Researchers studied coyote populations in Chicago over a seven-year period (2000–2007), proposing that coyotes have adapted well to living in densely populated urban environments while avoiding contact with humans. They found, among other things, that urban coyotes tend to live longer than their rural counterparts, kill rodents and small pets, and live anywhere from parks to industrial areas. The researchers estimate that there are up to 2,000 coyotes living in "the greater Chicago area" and that this circumstance may well apply to many other urban landscapes in North America.
Coyotes will sometimes mate with domestic dogs, usually in areas like Texas and Oklahoma, where the coyotes are plentiful and the breeding season is extended because of the warm weather. The resulting hybrids, called coydogs, maintain the coyote's predatory nature, along with the dog's lack of timidity toward humans, making them a more serious threat to livestock than pure-blooded animals.