NNTRC Snakes

Scientific Name

Crotalus vegrandis

Common Name 

Uracoan Rattlesnake

Physical Characteristics

Length, 16-28 in. (40-70 cm). Captive specimens can reach much larger lengths. The ground color is dark green to olive. The dorsal pattern consists of a series of narrow darker colored irregular bands separated by much lighter cream or white lines. Numerous light tipped scales are scattered throughout the dorsal area. There is a well developed spinal ridge which is usually evident towards neck area.

Geographic Range (South America)

Limited to the southern parts of Anzoátegui and Monagas states in Venezuela.

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savanna areas from 30 to 500 meters


Small mammals, birds, and frogs


Contains hemorrhagic and neurotoxic components resulting in tissue damage, edema, and respiratory distress.


The Uracoan Rattlesnake is considered a subspecies of the Crotalus durissus complex. However, it is frequently referred to as a separate species C. vegrandis. The Uracoan Rattlesnake has an irascible disposition and is quick to strike. When restrained they will thrash and fight wildly. Due to its neurotoxic venom, and disposition this snake is considered extremely dangerous.

This page was last updated on: February 12, 2016