Crotalus willardi

Edges head Rattlesnake ( Crotalus willardi )

The edges head Rattlesnake ( Crotalus willardi ) is a type of rattlesnakes (Crotalus ), their distribution extends from southern Arizona and New Mexico along the Mexican Sierra Madre Occidental into southern Zacatecas.

Features

The edges head rattlesnake is a relatively small rattlesnake with an average body length of about 50 centimeters, which can also be 60 inches long in rare cases. Characteristic is the head shape of the snake and her drawing, which differs greatly from that of other types of rattlesnakes. The name derives from a sharp edge along the sides of the head from the eyes to the snout, which is due to the raised scales of head region. Be drawn on the sides of the head, two bright lines, mostly white, with a light brown gap parallel to the mouth opening along.

The typical basic color is rust brown or gray, the color pattern consists of large rectangular and dark spots, which are bounded by and the rear by a black or dark brown line. The gaps between the spots are lighter to white, so that a secondary drawing created from light transom.

Distribution and habitat

The range of the snake begins in the Santa Rita and Huachuca Mountains in southern Arizona and the Animas Mountains in New Mexico. From here it moves to the south over the Mexican border and then along the Sierra Madre Occidental in the southwest to Zacatecas.

The habitat of the snake is dominated by pine-oak forests at an altitude 1600-2750 meters. They prefer grassy glades and moist microhabitats in the canyons.

Snake venom

About the specific effect of the poison of this type are not available.

System

Currently 5 subspecies of forest Rattlesnake be distinguished:

• C. w. amabilis in the Sierra del Nido in northern Chihuahua, Mexico
• C. w. meridionalis in the mountains of the states of Durango and Zacatecas
• C. w. obscurus in the Animas Mountains in New Mexico and Peloncillo
• C. w. silus in the mountainous regions in the north-eastern Sonora and western Chihuahua
• C. w. willardi in the Huachuca, Patagonia and Santa Rita Mountains in southeastern Alabama and northern Sonora, Mexico.