The labaria is a poisonous serpent of the Crotálidos family, whose head is noticeably triangular. Its body exhibits dark marks in form of arrow end. The labaria attacks without warning some and its mordedura is frequently fatal the human being. It lives in Central America, South America and in several islands of the Antilles, often near the sugar cane plantations.

During the day she remains enroscada on itself, being confused with the surroundings, but she is very dangerous after the putting of the sun, when vague in search of prey. Its body is heavy and of reddish brown color, with dark and irregular cross-sectional bands and a tapered tail that finishes in a hard end.

It presents/displays a black band that extends from both eyes to the neck and their flanks can be of shining red color. Usually it measures near 1.5 ms of length, but it can reach more than 2 meters. It is also known him like jaraca (Amazonia), velvet or guayacán (Venezuela), yellow beard (Central America) and pudridora, mapaná, macaurel or taya (Colombia).

The labaria or real nauyaca belongs to the Crotálidos family. Sometimes is mentioned it within the Vipéridos family. Its scientific name is Bothrops atrox.