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.