Crotalus willardi obscurus

Hathcock, C., and Holycross, A. 2021. Preparation and databasing of Animas and Peloncillo mountains snake locations. Received from Chuck Hathcock at NMDGF by email (jackieo@unm.edu) 10 December 2021.

Holycross, A.T. 1998. Natural History Observations at the El Pinito Ranch, July 1998: Courtesy Report to Landowners Josiah and Valar Austin. Department of Biology, Arizona State University, Tempe, AZ, p.13.

• Crotalus willardi obscurus
• Crotalus lepidus

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 Unpublished Report of Activities Conducted Under professional Service Contract No. 95-516-28 for the New Mexico Game and Fish Department (NMDGF).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

Montoya, B. (1993) Unpublished letter to Dr. John G. Rogers, Regional Director of US Fish and Wildlife Services, Regarding Fish Monitoring. Retrieved from Silver City Ranger District, Gila National Forest, USFS. 8 p.

• Oncorhynchus clarki virginalis
• Meda fulgida
• Gila nigrescens
• Rhinichthys cobitis
• Crotalus willardi obscurus
• Agosia chrysogaster
• Catostomus clarki
• Catostomus insignis

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.

New Mexico Department of Game and Fish. September, 2000. Threatened and endangered species of New Mexico, biennial review and recommendations. Revised Draft. 139 p.

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

• Crotalus willardi obscurus
• New Mexico ridgenose rattlesnake

Tyrpak, C. 1994. Ridgenose rattlers: Enigma in the Animas. New Mexico Wildlife. 39(2):19.

• Crotalus willardi obscurus
• ridgenose rattlesnake

Barker, D.G. 1990. Variation, infraspecific relationships and biogeography of the Ridgenose Rattlesnake, Crotalus willardi. Biology of the Pitvipers. p. 89-105.

• Crotalus willardi obscurus

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