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The first time it was used in English occurred in William Bullock's Six months' residence and travels in Mexico (1824), where it is variously transcribed as cayjotte and cocyotie.The word's spelling was standardized as "coyote" by the 1880s. lepophagus was a similar in weight to modern coyotes, but had shorter limb bones that indicates a less cursorial lifestyle.Man is the coyote's greatest threat, followed by cougars and gray wolves.In spite of this, coyotes sometimes mate with gray, eastern, or red wolves, producing "coywolf" hybrids.In the northeastern United States and eastern Canada, the eastern coyote (a larger subspecies, though still smaller than wolves) is the result of various historical and recent matings with various types of wolves.Genetic studies show that most North American wolves contain some level of coyote DNA.Unlike wolves (gray, eastern, or red), which have undergone an improvement of their public image, attitudes towards the coyote remain largely negative.Coyote males average 8 to 20 kg (18 to 44 lb) in weight, while females average 7 to 18 kg (15 to 40 lb), though size varies geographically.

It is highly flexible in social organization, living either in a family unit or in loosely knit packs of unrelated individuals. It is smaller than its close relative, the gray wolf, and slightly smaller than the closely related eastern wolf and red wolf.It fills much of the same ecological niche as the golden jackal does in Eurasia, though it is larger and more predatory, and is sometimes called the American jackal by zoologists.In early post-Columbian historical records, distinguishing between coyotes and wolves is often difficult.One record from 1750 in Kaskaskia, Illinois, written by a local priest, noted that the "wolves" encountered there were smaller and less daring than European wolves.