Geoffroy’s cat, (Oncifelis geoffroyi), South American cat of the family Felidae, found in mountainous regions, especially in Argentina. It is gray or brown with black markings and grows to a length of about 90 cm (36 inches), including a tail of about 40 cm (16 inches). Geoffroy’s cat climbs well and preys on small mammals and birds. It breeds once a year; litters consist of two or three kittens.