Eastern Black-Tailed Rattlesnake
Federal and State Protections
Countries of Occurrence
United States of America, Mexico
States or Providence
Texas (USA); Chihuahua, Nuevo León (MX)
70– 100 cm, rarely to 130 cm SVL*
Eastern Black-tailed Rattlesnakes may be gray, olive or tan, with dark gray, brown or black rhombic patterns. As the name suggests, this species has a distinct black tail often lacking any visible banding.
The Eastern Black-tailed Rattlesnake was recognized as a separate species distinct from the Black-tailed Rattlesnake (Crotalus molossus ssp.) in 2012. The two species can best be distinguished by geographic range.