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Western lowland olingo (Bassarcyon medius)The western olingo lives in forests in Central and South America, from Central Panama to Colombia and Ecuador, west of the Andes (1), lives in forests from Central Panama to Colombia and Ecuador west of the Andes, from sea level up to about 1800 m elevation.
It has an head-body length of 31-41 cm (12-16 in), a tail length of 35-52 cm (14-20 in) and weighs 0.9- 1.2 kg (2.0-2.6 lb) (1).
There are two subspecies. B. m. medius occurs in western Colombia and western Ecuador, in the Chocó region, on the western slopes of the Andes and in outlying western ranges (1). It occurs in regional sympatry with B. neblina at Otonga–San Francisco de las Pampas and probably elsewhere along the western versant of the Andes. B. m. orinomus occurs mainly in the Central American portion of the range, from central and eastern Panama, from the vicinity of the Canal Zone in the west to the Darien Mountains in the east and probably in northwestern Colombia. It has relatively larger anterior than B. m. medius (1).
The closest relative of the western lowland olingo is the Allen's lowland olingo (B. alleni), found east of the Andes, from which it diverged about 1.3 million years ago (1).