In the wild, foxes can live for up to 10 years, but most foxes only live for 2 to 3 years due to hunting, road accidents and diseases. Foxes are generally smaller than other members of the family Canidae such as wolves, jackals, and domestic dogs. Reynards (male foxes) weigh, on average, around 5.9 kilograms (13 lb) and vixens (female foxes) weigh less, at around 5.2 kilograms (11.5 lb). Fox-like features typically include a distinctive muzzle (a "fox face") and bushy tail. Other physical characteristics vary according to habitat. For example, the fennec fox (and other species of fox adapted to life in the desert, such as the kit fox) has large ears and short fur, whereas the Arctic fox has tiny ears and thick, insulating fur. Another example is the red fox which has a typical auburn pelt, the tail normally ending with white marking. Litter sizes can vary greatly according to species and environment – theArctic fox, for example, has an average litter of four to five, with eleven as maximum.