We studied kit fox den characteristics of the northern McGregor Range of Fort Bliss Military Reservation, New Mexico, during 1994 and 1995. Twenty radio-collared kit foxes used 132 different dens, including 16 natal dens. Kit fox dens were located primarily in creosote-dominated habitat found in relatively flat, well-drained terrain. Natal dens were virtually indistinguishable from non-natal dens; however, natal den entrances were taller than non-natal den entrances. Entrances found at all dens were oriented more frequently toward the northwest and southeast. Kit foxes used more new dens during the breeding (January–February) and pup-rearing season (May–July) than during gestation.
Rodrick, Penny J. and Mathews, Nancy E.
"Characteristics of natal and non-natal kit fox dens in the northern Chihuahuan Desert,"
Great Basin Naturalist: Vol. 59
, Article 6.
Available at: http://scholarsarchive.byu.edu/gbn/vol59/iss3/6