This is a large, stocky bamboo rat that makes burrows. In Malaysia it emerges in the early evening to feed on fallen fruit and other plant matter.
Rhizomys species have grey-brown to dull orange-brown fur. R. sumatrensis is larger than the other species described, with a relatively longer tail and a dark triangular patch on the crown.
It shelters in a burrow by day and, in Malaysia, emerges in the early evening to feed on fallen fruit and other plant matter in bamboo thickets. It also cuts bamboo stems and carries them to its burrow. Litters have three to five young, and gestation lasts at least 22 days.
IUCN Red List · Least Concern (LC) · Global