1350-1809 - Adult Isla Catalina rattleless rattlesnake (Crotalus catalinensis) in its brown color variation, Isla Santa Catalina, Baja California Sur, Mexico, North America
1112-5653 - Ashy morph of the Santa Catalina rattlesnake (Crotalus catalinensis), endemic to Isla Santa Catalina, Baja California Sur, Mexico, North America
1112-5655 - Brown morph of the Santa Catalina rattlesnake (Crotalus catalinensis), endemic to Isla Santa Catalina, Baja California Sur, Mexico, North America
1112-5654 - Ashy morph of the Santa Catalina rattlesnake (Crotalus catalinensis), endemic to Isla Santa Catalina, Baja California Sur, Mexico, North America
1112-3175 - Ash colored morph of the endemic rattleless rattlesnake (Crotalus catalinensis), Isla Santa Catalina, Baja California Sur, Mexico, North America
1112-3174 - Ash colored morph of the endemic rattleless rattlesnake (Crotalus catalinensis), Isla Santa Catalina, Baja California Sur, Mexico, North America
1112-3173 - Ash colored morph of the endemic rattleless rattlesnake (Crotalus catalinensis), Isla Santa Catalina, Baja California Sur, Mexico, North America
1112-2934 - Ash colored morph of the endemic rattleless rattlesnake (Crotalus catalinensis), Isla Santa Catalina, Baja California Sur, Mexico, North America
1112-2165 - Adult Isla Catalina rattleless rattlesnake (Crotalus catalinensis) in its brown color variation, Isla Santa Catalina, Baja California Sur, Mexico, North America
979-5566 - An adult Santa Catalina rattleless rattlesnake (Crotalus calalinensis) on the island of Santa Catalina in the Gulf of California (Sea of Cortez), Baja California Sur, Mexico
979-5567 - An adult Santa Catalina rattleless rattlesnake (Crotalus calalinensis) on the island of Santa Catalina in the Gulf of California (Sea of Cortez), Baja California Sur, Mexico
979-5563 - An adult Santa Catalina rattleless rattlesnake (Crotalus calalinensis) on the island of Santa Catalina in the Gulf of California (Sea of Cortez), Baja California Sur, Mexico
979-5564 - An adult Santa Catalina rattleless rattlesnake (Crotalus calalinensis) on the island of Santa Catalina in the Gulf of California (Sea of Cortez), Baja California Sur, Mexico
979-5568 - An adult Santa Catalina rattleless rattlesnake (Crotalus calalinensis) on the island of Santa Catalina in the Gulf of California (Sea of Cortez), Baja California Sur, Mexico
979-5561 - An adult Santa Catalina rattleless rattlesnake (Crotalus calalinensis) on the island of Santa Catalina in the Gulf of California (Sea of Cortez), Baja California Sur, Mexico
979-5565 - An adult Santa Catalina rattleless rattlesnake (Crotalus calalinensis) on the island of Santa Catalina in the Gulf of California (Sea of Cortez), Baja California Sur, Mexico
979-5559 - An adult Santa Catalina rattleless rattlesnake (Crotalus calalinensis) on the island of Santa Catalina in the Gulf of California (Sea of Cortez), Baja California Sur, Mexico
979-5560 - An adult Santa Catalina rattleless rattlesnake (Crotalus calalinensis) on the island of Santa Catalina in the Gulf of California (Sea of Cortez), Baja California Sur, Mexico
979-5562 - An adult Santa Catalina rattleless rattlesnake (Crotalus calalinensis) on the island of Santa Catalina in the Gulf of California (Sea of Cortez), Baja California Sur, Mexico
764-3109 - Prairie rattlesnake (Western rattlesnake) (Plains rattlesnake) (Crotalus viridis), Custer State Park, South Dakota, United States of America, North America
764-2621 - Hypomelanistic Western diamond-back rattlesnake (Western diamondback rattlesnake) (Crotalus atrox) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
764-2620 - Mojave rattlesnake (Mohave Rattlesnake) (Mojave Diamond Rattlesnake) (Desert Diamond Back) (Crotalus scutulatus) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
764-2623 - Speckled rattlesnake (Crotalus mitchellii) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
764-2632 - Arizona black rattlesnake (Crotalus cerberus) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
764-2622 - Speckled rattlesnake (Crotalus mitchellii) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
764-2627 - Speckled rattlesnake (Crotalus mitchellii) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
832-8149 - Western Diamondback Rattlesnake (Crotalus atrox), adult in defense pose among flowers in desert, Starr County, Rio Grande Valley, Texas, USA
764-2231 - Sonoran Desert sidewinder (Sonoran sidewinder) (Crotalus cerastes cercobombus) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
764-2230 - Western diamond-back rattlesnake (Western diamondback Rattlesnake) (Crotalus atrox) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
764-1722 - Hypomelanistic Western Diamond-Back Rattlesnake (Western Diamondback Rattlesnake) (Crotalus atrox) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
764-1699 - Northern Mojave Rattlesnake (Crotalus scutulatus scutulatus) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
764-1686 - Sonoran Desert Sidewinder (Sonoran Sidewinder) (Crotalus cerastes cercobombus) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
764-1687 - Sonoran Desert Sidewinder (Sonoran Sidewinder) (Crotalus cerastes cercobombus) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America