western diamond rattlesnake

noun
variants: or western diamondback

Definition of western diamond rattlesnake

: a large and notably venomous rattlesnake (Crotalus atrox) of dry areas of the southwestern U.S. and adjacent Mexico with a predominantly grayish to buffy ground, large light-margined rhomboid to diamond-shaped blotches on the back, and a black and white ringed tail

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