Crotalus willardi

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21	West Virginia’s State Reptile Add to Reading List Source URL: www.wvdnr.gov Language: English - Date: 2010-02-04 12:15:25 Crotalus horridus Zoology Pit viper U.S. state reptiles Crotalus lepidus Crotalus willardi Herpetology Rattlesnake Fauna of the United States
22	ARIZONA RIDGENOSE RATTLESNAKE Add to Reading List Source URL: library.sandiegozoo.org Language: English - Date: 2003-09-24 17:43:58 Crotalus willardi obscurus Crotalus willardi Crotalus Huachuca Mountains Chihuahua Rattlesnake Chiricahua Canelo Hills Geography of Arizona Arizona Geography of the United States
23	PDF Document Add to Reading List Source URL: www.azgfd.gov Language: English - Date: 2005-10-27 20:59:29 International Union for Conservation of Nature Endangered species IUCN Red List Endangered Species Act Arizona Game and Fish Department Crotalus willardi Wildlife Extinction Threatened species Environment Conservation Ecology