Crotalus willardi obscurus - Earth.com
crotalus willardi obscurus
12-22-2016

Crotalus willardi obscurus

Crotalus willardi obscurus NatureServe Explorer Species Reports — NatureServe Explorer is a source for authoritative conservation information on more than 50,000 plants, animals and ecological communtities of the U.S and Canada. NatureServe Explorer provides in-depth information on rare and endangered species, but includes common plants and animals too. NatureServe Explorer is a product of NatureServe in collaboration with the Natural Heritage Network.

ITIS Reports — ITIS (the Integrated Taxonomic Information System) is a source for authoritative taxonomic information on plants, animals, fungi, and microbes of North America and the world.

FWS Digital Media Library — The U.S. Fish and Wildlife Service’s National Digital Library is a searchable collection of selected images, historical artifacts, audio clips, publications, and video. Common names: New Mexico ridge-nosed rattlesnake. Animas ridge-nosed rattlesnake, Crotalus willardi obscurus is a venomous pitviper subspecies found in northwestern Mexico and the Southwestern United States.This is the only venomous snake listed as Threatened by the U.S. Fish and Wildlife Service. The species C. willardi is classified as Least Concern on the IUCN Red List of Threatened Species (v3.1, 2001). Species are listed as such due to their wide distribution, presumed large population, or because they are unlikely to be declining fast enough to qualify for listing in a more threatened category. The population trend was stable when assessed in 2007.
Although four of the five subspeciesare secure, the New Mexico ridge-nosed rattlesnak

Detailed information
Full Name: New Mexican Ridge-Nosed rattlesnake (Crotalus willardi obscurus)
Where found: Wherever found
Critical Habitat:N/A
Species Group:Reptiles
Current listing status
Status Date Listed Lead Region Where Listed
Threatened 08/21/1978 Southwest Region (Region 2) Wherever found
  • States/US Territories in which the New Mexican Ridge-Nosed rattlesnake, Wherever found is known to or is believed to occur: Arizona , New Mexico
  • US Counties in which the New Mexican Ridge-Nosed rattlesnake, Wherever found is known to or is believed to occur: View All
  • Countries in which the the New Mexican Ridge-Nosed rattlesnake, Wherever found is known to occur: Mexico
  • Additional species information
Recovery
To learn more about critical habitat please see http://ecos.fws.gov/crithab
Date
Title
Plan Action Status
Plan Status
03/22/1985 New Mexico Ridge-nosed Rattlesnake View Implementation Progress Final
Date
Title
Plan Action Status
Plan Status
03/22/1985 New Mexico Ridge-nosed Rattlesnake View Implementation Progress Final
Date
Citation Page
Title
Document Type
04/23/2007 72 FR 20134 20136 5-Year Reviews of 24 Southwestern Species
  • Notice 5-year Review, Initiation
Date
Citation Page
Title
Document Type
Status
08/04/1978 43 FR 34476 34480 Listing of the New Mexican Ridge-nosed Rattlesnake as a Threatened Species with Critical Habitat Final Rule Final designated
05/26/1977 42 FR 27007 27009 Proposed Endangered Status and Critical Habitat for New Mexico Ridge-Nosed Rattlesnake; 42 FR 27007 27009 (Crotalus willardi obscurus) Proposed Rule Not Required
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