western patch-nosed snake - salvadora hexalepis

america animal arid arizona buckskin butleri canyon colubrid colubrids crawling creepy danger desert eye gray gulch heat hexalepis hexalepsis macro mexico nature nonvenomous north nose of pale patchnosed patched patchnose reptile reptiles salvadora sand scales serpent sirtalis skin slender slithering snake snakes snakeskin southwest southwestern states striped thamnophis the united utah western wild wildlife