This den may be as much as 75 feet long and can have 10 or more exits. There are also numerous side chambers used for food storage and for the transfer of young, once a chamber becomes too soiled to inhabit. The young venture out of the den after about 5 weeks, and are usually weaned by 10 weeks. The father provides food for the entire family during this period. The family remains together until late fall, then separates.
All foxes generally remain solitary throughout the winter.
The Red Fox has the largest range in North America, but occurs only in the Chihuahuan Desert of eastern New Mexico. The Kit Fox occurs in all 4 southwestern deserts, while the Swift Fox generally does not occur in any desert environments.