Bothrops neuwiedi subtriangular, or headphone-shaped and oppose each other middorsally. The belly is white or yellow with gray speckling. Juveniles have a white tail tip. This species is found in South America east of the Andes and south of approx. 5°S, including Brazil (southern Maranhão, Piauí, Ceará, Bahia, Goiás, Mato Grosso, an isolated population in Amazonas, Rondônia and all southern states), Bolivia, Paraguay, Argentina (Catamarca, Córdoba, Corrientes, Chaco, Entre Ríos, Formosa, Jujuy, La Pampa, La Rioja, Mendoza, Misiones, Salta, San Juan, San Luis, Santa Fe, Santiago del Estero and Tucumán) and Uruguay. According to Vanzolini (1981), the type locality given is ""provincia
Formosa, Goiás information about tourist sites is from the Prefeitura de Formosa Lagoa Feia means "ugly lake" in Portuguese. Located four kilometers from the center of the town, the Preto River, which flows south into the São Francisco, begins here. The south bank is part of an army base which is used for field training. This cave, called Hole of the Macaws, is 41 kilometers from Formosa, following BR-20 north as far as the village of Bezerra. The cave is located in the middle of a flat landscape with scarce vegetation. One may see high trees and a river which forms a