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The gray fox (Urocyon cinereoargenteus), or grey fox, is an omnivorous mammal of the family Canidae, widespread throughout North America and Central America.This species and its only congener, the diminutive island fox (Urocyon littoralis) of the California Channel Islands, are the only living members of the genus Urocyon, which is considered to be genetically sister to all other living canids.
Juvenile red foxes are known as kits. Males are called tods or dogs, females are called vixens, and young are known as cubs or kits. [14] Although the Arctic fox has a small native population in northern Scandinavia, and while the corsac fox's range extends into European Russia, the red fox is the only fox native to Western Europe, and so is simply called "the fox" in colloquial British English.
The North American red foxes have been traditionally considered either as subspecies of the Old World red foxes or subspecies of their own species, V. fulva.Due to the opinion that North American red foxes were introduced from Europe, all North American red foxes have been seen as conspecific with V. vulpes; [2] however, genetic analyses of global red fox haplotypes indicates that the North ...
Foxes live on every continent except Antarctica. The most common and widespread species of fox is the red fox ( Vulpes vulpes ) with about 47 recognized subspecies . [ 2 ] The global distribution of foxes, together with their widespread reputation for cunning, has contributed to their prominence in popular culture and folklore in many societies ...
Sierra Nevada red foxes are one of three fox subspecies in the montane clade of North America, occurring in the Cascade Mountains south of the Columbia River and California's Sierra Nevada range. [4] [5] Joseph Grinnell identified separated montane fox populations in the Oregon Cascades, Mount Shasta, Lassen Peak, and Sierra Nevada in 1937. [6]
They live in large dens in frost-free, slightly raised ground. These are complex systems of tunnels covering as much as 1,000 m 2 (11,000 sq ft) and are often in eskers, long ridges of sedimentary material deposited in formerly glaciated regions. These dens may be in existence for many decades and are used by many generations of foxes. [19]
Adults live in pairs, and although some individuals mate for life, others choose different partners each year. Gestation takes around 51 days, and four to five kits are born. [7] [8] The swift fox only has one litter annually, but may occupy up to thirteen dens in one year, moving because prey is scarce or because skin parasites build up inside ...
After mating, foxes make a maternity den for raising their offspring. Most often, the mother and father will find and enlarge an old woodchuck burrow. Sometimes, a hollow log, streambank, rock pile, cave, or dense shrub will play the role as a den. The den is usually chosen at a place where there is raised ground so the red foxes can see all ...