The kit fox (Vulpes macrotis) is a fox species of North America. Its range is primarily in the southwestern United States and northern and central Mexico. Some mammalogists classify it as conspecific with the swift fox, V. velox, but molecular systematics imply that the two species are distinct.

The northernmost part of its range is the arid interior of Oregon. Its eastern limit is southwestern Colorado. It can be found south through Nevada, Utah, southeastern California, Arizona, New Mexico, and into western Texas.

The kit fox is the smallest species of the Canidae family that can be found in North America. They have large ears, between 71–95 mm (2.8–3.75 in), that help the fox lower its body temperature and give it exceptional hearing. This species exhibits sexual dimorphism, with the male being slightly larger. The average species weight is between 1.6–2.7 kg (3.5–6 lbs). The body length is 455 to 535 mm (18 to 21 in). The tail adds another 250–340 mm (9.85–13.4 in) to their length.

It usually has a gray coat, with rusty tones, and a black tip to its tail. Unlike the gray fox, it has no stripe along the length of its tail. Their color ranges from yellowish to gray. Their back is usually darker than the majority of their coat, and their belly and inner ears are usually lighter. They have distinct dark patches around the nose.

Kit may refer to:

Any collection of items or components needed for a specific purpose, especially for use by a workman, or personal effects packed for travelling, such as:

Fox is a common name for many species of omnivorous mammals belonging to the Canidae family. Foxes are small to medium-sized canids (slightly smaller than the medium-sized domestic dog), characterized by possessing a long narrow snout, and a bushy tail (or brush).

Members of about 37 species are referred to as foxes, of which only 12 species actually belong to the Vulpes genus of "true foxes". By far the most common and widespread species of fox is the red fox (Vulpes vulpes), although various species are found on almost every continent. The presence of fox-like carnivores all over the globe, together with their widespread reputation for cunning, has contributed to their appearance in popular culture and folklore in many societies around the world (see also Foxes in culture).

The Modern English word "fox" is Old English, and comes from the Proto-Germanic word fukh – compare German Fuchs, Gothic fauho, Old Norse foa and Dutch vos. It corresponds to the Proto-Indo-European word puk- meaning "tail of it" (compare Sanskrit puccha, also "tail"). The bushy tail is also the source of the word for fox in Welsh: llwynog, from llwyn, "bush, grove".Lithuanian: uodegis, from uodega, "tail", Portuguese: raposa, from rabo, "tail" and Ojibwa: waagosh, from waa, which refers to the up and down "bounce" or flickering of an animal or its tail. Male foxes are known as dogs or reynards, females as vixens, and young as kits, pups or cubs. A group of foxes is a "skulk", "leash", "troop" or "earth".