Nasua nasua is broadly distributed in South America, ranging from Colombia and Venezuela in the north to Uruguay and northern Argentina in the south (Gompper and Decker, 1998). The species is absent from the Llano grasslands of Venezuela (Eisenberg, 1989) and has also been introduced to Robinson Crusoe, one of the Juan Fernández Islands of Chile (Colwell, 1989; Miller and Rottmann, 1976; Pine et al., 1979).