Western Diamondback Rattlesnake

Adults commonly grow to 4 ft in length. Specimens over 5 ft are infrequently encountered, while those over 6 ft are very rare. The maximum reported length considered to be reliable is 7 ft. Males become much larger than females, although this difference in size does not occur until after they have reached sexual maturity. Rattlesnakes of this species considered medium-sized weighed 4 to 6 lb, while very large specimens can reportedly weigh up to 15 lb. The color pattern generally consists of a dusty-looking gray-brown ground color, but it may also be pinkish-brown, brick red, yellowish, pinkish, or chalky white. This ground color is overlaid dorsally with a series of 24-25 dorsal body blotches that are dark gray-brown to brown in color. The first of these may be a pair of short stripes that extend backwards to eventually merge. Some of the first few blotches may be somewhat rectangular, but then become more hexagonal and eventually take on a distinctive diamond shape hence the name "Diamondback rattlesnake".

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