Crotalus willardi

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

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

• Crotalus willardi

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.

Radke, W.R. 2019. NMDGF Permit Data.

• Crotalus atrox
• Crotalus lepidus
• Crotalus molossus
• Lampropeltis pyromelana
• Thamnophis cyrtopsis
• 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

Barker, D.G. 1991. An investigation of the natural history of the New Mexico ridgenose rattlesnake, Crotalus willardi obscurus. 100 p.

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

Painter, C. 2012. Spreadsheet of herpetofuanal localities for collected specimens. New Mexico Department of Game and Fish.