The genus Urocyon (from the Greek word for "tailed dog") is a genus that contains two (or possibly three, see next paragraph) living Western Hemisphere foxes in the family Canidae; the gray fox (Urocyon cinereoargenteus) and the closely related island fox (Urocyon littoralis), which is a dwarf cousin of the gray fox; as well as one fossil species, Urocyon progressus.