Urutu (Bothrops alternatus) known in English as Crossed Pit Viper found in Brazil, Paraguay, Uruguay and Argentina. Within its range, it is an important cause of snakebite. The specific name, which is Latin for “alternating”, is apparently a reference to the staggered markings along the body. No subspecies are currently recognized. Large and stout, Urutu is a terrestrial species which exceeds 2 m in length, with females being significantly longer and heavier than males.