Members of this family occur primarily in the southern cone of South America and, according to Contreras and oth ers in 1987, most species occur between 16°S and 41°S latitude. Redford and Eisenberg in 1992 described the family's distribution as encompassing primarily areas in Bolivia, Chile, and Argentina, and eight of the 12 currently recognized species have ranges that are restricted almost exclusively to the western side of the Andes in Chile. Several species occur in Andean zones at higher elevations ranging 9,840-16,400 ft (3,000-5,000 m), whereas others maintain distributions from near sea level in coastal areas up to approximately 3,940 ft (1,200 m).

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