Kit fox (Zool.), a small burrowing fox (Vulpes velox), inhabiting the region of the Rocky Mountains. It is brownish gray, reddish on the breast and flanks, and white below. Called also swift fox.
... the prongbuck "antelope"[5] thronged the grassy flats, and elk browsed on the foliage of the thickets along the river banks. Grizzly bears and black bears,[6] large grey wolves, the small coyote wolf, the pretty little kit fox and large red fox preyed on these herbivores, as did also pumas and lynxes. Marmots and prairie hares (Lepus campestris)—often called rabbits by the pioneers, who also named the marmots "wood-chucks"—frolicked ... — Pioneers in Canada • Sir Harry Johnston
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