The crab-eating fox (Cerdocyon thous), also known as the forest fox, wood fox, Maikong, and the common fox, is a species of medium-sized canid endemic to the central part of South America. The crab eating fox appeared during the Pliocene epoch. Like South American foxes, which are in the genus Lycalopex, it is not closely related to true foxes. Cerdocyon comes from the Greek words kerdo (meaning fox) and cyon (dog) referring to the dog-and fox-like characteristics of this animal.
The crab-eating fox is a canid that ranges in savannas, woodlands, subtropical forests, prickly and shrubby thickets, and tropical savannas. These are present in the caatinga, plains, and campos in Colombia, southern Venezuela, Paraguay, Uruguay and northern Argentina at the southernmost reaches of its range (Eisenberg, 1999). The crab-eating fox has also been sighted in Panama beginning in the 1990's.
Its habitat also includes wooded riverbanks such as riparian forests. In the rainy season their range moves uphill, whilst in drier times they move to lower ground (Nowak, 1999).
Their habitat covers all environments except rainforests, high mountains, and open grassy savannas. In some regions of their range, they are threatened with extirpation.