• Knoxville Zoo, Knoxville, Tennessee, USA
  • Knoxville Zoo, Knoxville, Tennessee, USA
  • Omaha Henry Doorly Zoo, Omaha, Nebraska, USA
  • Saint Louis Zoo, Saint Louis, Missouri, USA
  • Saint Louis Zoo, Saint Louis, Missouri, USA
  • Knoxville Zoo, Knoxville, Tennessee, USA
  • Knoxville Zoo, Knoxville, Tennessee, USA
  • Omaha Henry Doorly Zoo, Omaha, Nebraska, USA
  • Omaha Henry Doorly Zoo, Omaha, Nebraska, USA
  • Omaha Henry Doorly Zoo, Omaha, Nebraska, USA
  • Saint Louis Zoo, Saint Louis, Missouri, USA
  • Saint Louis Zoo, Saint Louis, Missouri, USA
  • Saint Louis Zoo, Saint Louis, Missouri, USA
  • Saint Louis Zoo, Saint Louis, Missouri, USA
  • Saint Louis Zoo, Saint Louis, Missouri, USA
  • Saint Louis Zoo, Saint Louis, Missouri, USA
  • Saint Louis Zoo, Saint Louis, Missouri, USA
  • Saint Louis Zoo, Saint Louis, Missouri, USA
  • Saint Louis Zoo, Saint Louis, Missouri, USA
  • Saint Louis Zoo, Saint Louis, Missouri, USA
  • Saint Louis Zoo, Saint Louis, Missouri, USA
  • Omaha Henry Doorly Zoo, Omaha, Nebraska, USA
  • Omaha Henry Doorly Zoo, Omaha, Nebraska, USA
  • Arizona-Sonora Desert Museum, Tucson, Arizona, USA
  • Crawls Through A Cap At The Arizona Sonora Desert Museum, Tucson, Arizona, USA
  • Arizona-Sonora Desert Museum, Tucson, Arizona, USA
  • Knoxville Zoo, Knoxville, Tennessee, USA
  • Knoxville Zoo, Knoxville, Tennessee, USA
  • Omaha Henry Doorly Zoo, Omaha, Nebraska, USA
  • Saint Louis Zoo, Saint Louis, Missouri, USA
  • Saint Louis Zoo, Saint Louis, Missouri, USA
  • Knoxville Zoo, Knoxville, Tennessee, USA
  • Knoxville Zoo, Knoxville, Tennessee, USA
  • Omaha Henry Doorly Zoo, Omaha, Nebraska, USA
  • Omaha Henry Doorly Zoo, Omaha, Nebraska, USA
  • Omaha Henry Doorly Zoo, Omaha, Nebraska, USA
  • Saint Louis Zoo, Saint Louis, Missouri, USA
  • Saint Louis Zoo, Saint Louis, Missouri, USA
  • Saint Louis Zoo, Saint Louis, Missouri, USA
  • Saint Louis Zoo, Saint Louis, Missouri, USA
  • Saint Louis Zoo, Saint Louis, Missouri, USA
  • Saint Louis Zoo, Saint Louis, Missouri, USA
  • Saint Louis Zoo, Saint Louis, Missouri, USA
  • Saint Louis Zoo, Saint Louis, Missouri, USA
  • Saint Louis Zoo, Saint Louis, Missouri, USA
  • Saint Louis Zoo, Saint Louis, Missouri, USA
  • Saint Louis Zoo, Saint Louis, Missouri, USA
  • Omaha Henry Doorly Zoo, Omaha, Nebraska, USA
  • Omaha Henry Doorly Zoo, Omaha, Nebraska, USA
  • Arizona-Sonora Desert Museum, Tucson, Arizona, USA
  • Crawls Through A Cap At The Arizona Sonora Desert Museum, Tucson, Arizona, USA
  • Arizona-Sonora Desert Museum, Tucson, Arizona, USA

Photo Ark

New Mexican Ridge-Nosed Rattlesnake

Crotalus willardi

Saint Louis Zoo, Saint Louis, Missouri, USA

Least Concern

This species is represented by a fairly large number of occurrences (subpopulations). On a range-wide scale, Campbell and Lamar (2004) mapped about 43 collection sites. The adult population size is unknown but probably exceeds 10,000. This snake appears not to be abundant in most areas in the United States (Lowe et al. 1986), but it is regarded as fairly common in Mexico. In New Mexico, a population that appeared to be declining in the 1970s was well-protected and stable in the 1990s (Degenhardt et al. 1996). Currently, the extent of occurrence, area of occupancy, number of subpopulations, and population size ... Read More

On a range-wide basis, no major threats are known. As of the early 1980s, populations in Arizona were not threatened (Johnson cited by Ernst 1992). Threats in Arizona include illegal collecting, mining, recreational development, and wood cutting (Lowe et al. 1986). Read More

Follow Photo Ark

Keep up with Photo Ark and Joel Sartore by following the project on Facebook and Instagram.


 

Hammerson, G.A., Vazquez Díaz, J. & Quintero Díaz, G.E. 2007. Crotalus willardi. The IUCN Red List of Threatened Species 2007: e.T62253A12584209. http://dx.doi.org/10.2305/IUCN.UK.2007.RLTS.T62253A12584209.en