In 1969 the San Joaquin Kit Fox could be found from Los Banos, Merced Country, on the west side of the valley, and White River south of Porterville, Tulare Country, on the east side, south to Kern and San Luis Obispo countries. The ears of the Kit Fox are conspicuously large and are covered on the inner side by dense, stiff white hairs that almost cover the auricle opening. The San Juaquin Kit Fox is carnivorous.
Vixens are monestrous and have only one litter per year.