Bogert, C.M. and W.G. Degenhardt. 1961. An addition to the fauna of the United States, the Chihuahua ridge-nosed rattlesnake in New Mexico. American Museum of Nat. Hist. Novitates 2064:1-15.

Harris, H.S. and R.S. Simmons. 1976. The paleogeography and evolution of Crotalus willardi, with a formal description of a new subspecies from New Mexico, United States. Bul. of Maryland Herp. Soc., 12(1):1-22.

Kauffeld, C. 1969. Snakes: The keeper and the kept. Doubleday and Co., Inc. Garden City, N.Y. 248 pp.

Christman, B. 2017. FWS Annual Permit Report and Data for Chiricahua Leopard Frog, Narrow-headed and Mexican Gartersnakes, and New Mexico Ridge-nosed Rattlesnake. FWS Permit TE-071287-1. Albuquerque, NM.

Christman, M.R. 2011. Photograph and sighting of Crotalus willardi obscurus.

• Crotalus willardi obscurus
• New Mexico ridgenose rattlesnake

Painter, C. 1990. Locality of Crotalus willardi obscurus in Peloncillo Mountains. Hand drawn from U.S.G.S. Guadalupe Canyon Ariz-NM and Apache AZ-NM quadrangle, 15 min series - 19 and attached xeroxed 15 min. topo map.

Lowe, C. Dept. of Ecology and evolutionary Biology, University of Arizona, Tucson, AZ. (602) 621-3187.

Painter, C. 1998. Status of New Mexico Ridgenose Rattlesnake. Performance report to U.S. Fish and Wildlife Service, Section 6 E-23-6. New Mexico Department of Game and Fish, 20 p.

• ridgenose rattlesnake
• Crotalus willardi obscurus
• Crotalus lepidus klauberi
• Banded Rock Rattlesnake
• Lampropeltis knoblochi
• Knobloch's mountain kingsnake

S60DEGSBNMUS, Legacy reference. Physical copy not yet located.

S61KAUSBNMUS, Legacy reference. Physical copy not yet located.

SXXXXXSBNMUS, Legacy reference. Physical copy not yet located.

Painter, C. 2006. Field forms for Chiricahua Leopard Frogs (Rana chiricahuensis) in Southwesten New Mexico. 1000+ p.(2000-2004).

• Rana chiricahuensis
• Chiricahua leopard frog
• survey

Propst, D. 2007. New Mexico Department of Game and Fish collections under USFWS permit TE815409-0 for 2006. 4 p.

• Rana chiricahuensis
• Crotalus willardi obscurus
• Thermosphaeroma thermophilum
• Ptychocheilus lucius
• Oncorhynchus gilae
• San Juan River
• Gila
• TE815409

Hubbard, J.P. et.al. 1977. A biological inventory of the Animas Mountains. Hidalgo County, New Mexico. Unpubl. manuscript for endangered species program, N.M. Dept. of Game and Fish. 53 pp.

• GOULD'S WILD TURKEY
• WHITE-EARED HUMMINGBIRD
• YELLOW-EYED JUNCO

Applegarth, J.S. 1980. The ridge-nosed rattlesnake in New Mexico: a review of existing information and a search for suitable habitat on public lands. Unpubl. manuscript for US Bureau of Land Mngt., Las Cruces, 140 pp.

• COLLARED PECCARY

U80APPO1NMUS, Legacy reference. Physical copy not yet located.

Painter, C.W. 1990. Field trip into the Animas Mountains, Gray Ranch, Hidalgo County, New Mexico. Unpub. manuscript to the Nature Conservancy NMNHP. 4 pp.

Sugg, D.W. 1990. Unpublished listing of amphibians specimens from MSB. 5 pp.

Painter, C.W. et al. 1991. The continuation of studies of the natural history of the New Mexico ridgenose rattlesnake Crotalus willardi obscurus, Gray Ranch NM, Unpubl. report for N.M. Dept Game and Fish submitted 15 Oct 91. 6 pp.

Montoya, B. 1993.Tables and maps for aquatic species collected during the calendar year1993. New Mexico Department of Game and Fish. Santa Fe, New Mexico. 7 p.

Painter, C. 1994. Notes from phone call to Pat Mehlhop on desert tortoise and Crotalus willardi.

• Crotalus willardi

Holycross, A.T. 1995. Biogeography of Crotalus willardi in the Madrean Archipelago of Arizona. Unpubl. Quarterly Progress Report. Heritage IIPAM Grants-in-Aid Award I95048, p. 5.

• Crotalus willardi
• Crotalus willardi obscurus

Holycross, A.T. 1995. Status of the Animas Mountains Population of Crotalus willardi obscurus. Unpublished Report of Activities Conducted Under professional Service Contract No. 95-516-28 for the New Mexico Game and Fish Department (NMDGF). Arizona State

• Crotalus willardi obscurus
• Peloncillo Mountains
• New Mexico ridgenose rattlesnake