Behavior
In the wild, the swift fox usually lives 3–6 years, but may live up to 14 years in captivity. It is primarily nocturnal, spending only evenings and nighttime above ground in the summer. Daytime activities are usually confined to the den, but it has been known to spend the warm midday period above ground during the winter. The swift fox is more heavily dependent on its den than most North American canids, using them as shelter from predators. These dens are usually underground burrows that are two to four meters in length. It has been known to run very fast, at speeds of over 50 km/h (30 mph). The coyote is the swift fox's main predator, but often chooses not to consume the swift fox. Other predators include the badger, golden eagle, and bobcat. It is also vulnerable to trapping and poisoning, as well as death on highways.
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