|Swift fox (in summer coat)|
Heading out into the west, the first of these two species we come to is the swift fox (Vulpes velox). The native range of this animal happens to line pretty up well with a series of interstate borders, and it's found from northwestern Texas/eastern New Mexico in the south to western South Dakota/eastern Wyoming in the north.
As one might imagine, given this area, they like flat, wide open short grass prairie, and apparently avoid everything else, although they don't seem to have a great problem with cropland. They are small foxes, standing only about 30 cm (one foot) high, similar in height to a small terrier or a King Charles spaniel, although, due to a slim build, they are also considerably lighter than those dog breeds. During the winter, they have a dark grizzled grey back with tan markings on the flanks and legs, but, aside from the black tip to the tail and the pale belly, the whole animal takes on a browner hue in the summer, when it sheds its thick pelt.