The flat-headed cat (Prionailurus planiceps) is a small wild cat restricted to the Malay Peninsula, Borneo, and Sumatra, and it inhabits lowland tropical rainforests, principally near rivers. Head-body length is 40–60 cm, tail length 13–20 cm, and weight about 1.5–2.75 kg, with males larger than females. It has webbed feet and is a good swimmer; it is believed to feed mainly on fish and crustaceans. It is nocturnal or crepuscular and lives solitarily. Much about its reproduction and ecology remains unknown, the number of mature individuals is small, and it is listed as Critically Endangered (IUCN Category I B).