Sistrurus ravus

The Mexican dwarf rattlesnake ( Sistrurus ravus ) is a species of dwarf rattlesnakes ( Sistrurus ), which is found only in the highlands of central Mexico, in contrast to the two other species of the genus.

Features

The Mexican dwarf rattlesnake reached an average body length of about 50 centimeters and is rarely time to 75 inches long. The basic color of the snake is usually brown or gray with a drawing of dark - brown or rust spots on the back, which are bordered by narrow black scale rows and lighter as a rule to the center. The head is unmarked, on the neck, there is a conspicuous spot pair.

Distribution and habitat

The Mexican dwarf rattlesnake is distributed in three sub-species in a relatively small area in the highlands of central Mexico. Here comes the nominate P. r. ravus large part of this area before, p r. brunneus is on the highlands of Oaxacan and S. r. exiguus restricted to the Sierra Madre del Sur in Guerrero.

As habitat preferred the snake glades and grassy areas in pine - oak mixed forests, thickets and in the cloud forest. In addition, however, they are also found in other habitats such as gravel plains, lava or cacti in desert areas in the distribution area.

Snake venom

No specific effects and ingredients of the poison of this snake are unknown.