New Mexico ridgenose rattlesnake
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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.
Painter, C. and L. Pierce. 2001. New Mexico amphibian and reptile GIS coverages. 123 p.
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Painter, C. 2008. Conservation of endangered, threatened, and sensitive amphibians and reptiles. Performance report to U.S. Fish and Wildlife Report, Section 6 E-61-2. 68p.
Greenwalt, L. 1978. Rules and regulations. Federal Register. vol.43, NO. 151-Friday, August 4, 1978.
Barker, D.G. 1991. An investigation of the natural history of the New Mexico ridgenose rattlesnake, Crotalus willardi obscurus. 100 p.
Holycross, A.T. 1996. Recommendations for limiting impacts of prescribed burns on Crotalus willardi obscurus. Unpubl. letter to USFWS. Arizona State University, Department of Zoology, Tempe, AZ. p. 5.
Holycross, A.T. 1995. Status of the Animas Mountains Population of Crotalus willardi obscurus. Unpubl. Preliminary Report of Activities Conducted Under Professional Service Contract No. 95-516-28 for the New Mexico Department of Game and Fish (NMDGF). Ari