Two-headed rattlesnake

s are creatures found in Mesa Verde in 2253.

Characteristics
They're the pets of the Vipers camped in the canyon. The Vipers give the snakes freedom to roam, and the snakes are usually found in the underground caverns hunting molerats. The snakes will be randomly roaming the Mesa Verde caves. If they encounter a molerat, they'll attack it.

Appearances
s were to appear in Van Buren, the canceled Fallout 3 by Black Isle Studios.