The Long-furred Oecomys is an arboreal rat with dense, long fur and a tail longer than its body. It eats fruit and small seeds and uses habitats from forest to shrubby grassland.
The back is dark tawny brown, sometimes becoming brighter ocher on the cheeks, shoulders, and sides. Its fur is soft and dense, and the tail is longer than the body.
It is nocturnal and arboreal or partly arboreal. It eats fruit and small seeds, and nests have been recorded close to the ground.
IUCN Red List · Least Concern (LC) · Global