Western Diamondback Rattlesnake (Crotalus atrox), adult in defense pose at sunset in desert, Starr County, Rio Grande Valley, Texas, USA

adult america american animal animals at atrox county crotalus day daylight daytime defense desert diamondback during exterior exteriors fauna grande in kingdom nature north of outdoor photo photos pose rattler rattlers rattlesnake rattlesnakes reptile reptiles reptilia rio serpentes shot shots snake snakes starr states sunset texas the united us us american usa valley vertebrata vertebrate vertebrates viper viperidae vipers western wild wildlife world