The South American Gray Fox (Lycalopex griseus), also known as the Patagonian Fox, the chilla or the Gray Zorro, is endemic to the southern part of South America.
The head is reddish-brown flecked with white. The ears are large and there is a distinct black spot on the chin. The underparts are pale grey. The limbs are tawny and the thighs are crossed by a dark bar. The long, bushy tail has a dark dorsal stripe and dark tip with a paler, mottled underside.
The diet varies in different parts of its range and at different times of the year. It consists mainly of mammals, birds, arthropods, bird eggs, reptiles, fruit, and carrion. The main prey items seem to be small mammals, especially rodents.