Body size. The dog-sized red fox has a body about 56 to 63 cm in length, with a 35 to 41 cm tail. They weigh from 3 to 7 kg, with the males usually outweighing the females by about 1 kg.
Territory boundaries often conform to physical landscape features such as well-traveled roads and streams. Territory defense is primarily by nonaggressive mechanisms involving urine scent-marking and avoidance behaviors. Scent marking occurs throughout the territory; there is little patrolling of territory boundaries.