Photos by Chris Brown

Scientific name: Crotalus ruber (exsul)

Common name: Red Diamond Rattlesnake

Size: 29-63 in (73-160 cm)

Distinguishing characters: A rattlesnake with tan, pink, or reddish dorsal color and prominent light-edged diamonds of darker hue; faint pepper marks over dorsal pattern; tail with conspicuous black and white rings; broad vertical eye stripe edged in lighter color.

Juveniles: Dark and light grey hues in pattern, changing to reddish with age.

Dimorphism: Male tail is more stout.

Similar species: Crotalus viridis: Lacks conspicuous black and white tail bands; juveniles have yellow-green tail.

Additional notes: A large species often associated with coastal sage scrub, rocky hillsides, and outcrops. Relatively docile, although some individuals may hiss loudly and/or rattle when annoyed. VENOMOUS; don't handle or use extreme caution. The name for this species may be changed to exsul in the future. This is a species in decline, with increasing interest in its behaviors and ranges, sightings should be verified and recorded.

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