This dog-like fox lives in rainforests of South America, including the Amazon basin. It is on the Brazilian list of endangered species due to extensive habitat loss.
Males are smaller than females.
There is a dark band running along the back and tail, plus a light-colored patch at the underside of the base of the tail. The long, bushy tail, sometimes called a sweep, is black. It helps the fox change direction quickly and keeps the fox's feet and nose warm when it curls up to sleep. Like all foxes, it has sharp, curved claws, sharp teeth, and insulating fur. The diet of this fox is unknown.