Common names: black-tailed rattlesnake, green rattler, Northern black-tailed rattlesnake. Crotalus molossus is a venomous pit viper species found in the southwestern United States and Mexico. Four subspecies are currently recognized, including the nominate subspecies described here.
DESCRIPTION: A large (up to 1,219 mm or 48" in total length excluding rattle), brown, gray, yellow-brown, or golden yellow rattlesnake with a series of large, black or brown, blotches on the back (dorsal blotches). The blotches appear jagged-edged because each of this snakes dorsal scales is usually but a single color.
The Black-tailed Rattlesnake (Crotalus molossus) is a large (< 1524 mm total length, Platt and Rainwater 2009, but most are < 1000 mm TL in Arizona), heavy- bodied pit viper. Atop the head is usually some darkening of the snout and normally a dark band or patch between the eyes, although some desert specimens lack ...
Crotalus molossus (the black-tailed rattlesnake) is found in the United States from central and western Texas west through the southern half of New Mexico, northern and western Arizona, and south toward the Mexican Plateau, Mesa Del Sur, and Oaxaca, Mexico. They are also found on the islands of Tiburon and San ...
Venomous Snakes - Information on the Northern Black-tailed Rattlesnake ( Crotalus molossus molossus)
Background color can be extremely variable, ranging from yellowish tan or olive to gray or dark brown. A series of very dark blotches are found down the back with the posteriormost blotches forming crossbands. Top or crown of the head is often dark brown or black and contrasts with the tan or yellow coloration of the rest of ...
Crotalus molossus is a venomous pit viper species found in the southwestern United States and Mexico. Four subspecies are currently recognized, including the nominate subspecies described here. (Source: Wikipedia. Photo: (c) Robby Deans, some rights reserved (CC BY-NC))
Descriptions and articles about the Black-tailed Rattlesnake, scientifically known as Crotalus molossus in the Encyclopedia of Life. Includes Overview; Brief...
Range Description: The species' range extends from western, central, and southern Arizona, central and southern New Mexico, and southwestern and central Texas in the United States, south through Mexico to the southern edge of the Mexican Plateau and Mesa del Sur (Oaxaca), including Isla Tiburon in the Gulf of ...