 In the Eurasian desert regions, foxes may use the burrows of wolves, porcupines and other large mammals, as well as those dug by gerbil colonies.Compared to burrows constructed by Arctic foxes, badgers, marmots and corsac foxes, red fox dens are not overly complex.Red fox burrows are divided into a den and temporary burrows, which consist only of a small passage or cave for concealment.