Crotalus cerberus is a venomous pit viper species[3][4] found in the southwestern United States.

[7] The color pattern consists of a dark grayish, brownish black, reddish brown, or blackish ground color, overlaid with a dorsal pattern of blotches that are rectangular anteriorly, becoming subhexagonal posteriorly, eventually becoming crossbands just before the tail.

However, specimens also may be a uniform dark color without any clear dorsal pattern, or the dorsal blotches may be even darker and bordered with white, cream, or yellow transverse rows of scales, or the color pattern may be quite pale with a significant amount of yellow mixed in.

[7] The Arizona black rattlesnake is the first species of snake observed to exhibit complex social behavior,[11] and like all temperate pit vipers, care for their babies.

Females remain with their young in nests for 7 to 14 days, and mothers have been observed cooperatively parenting their broods.