The most common herbivores found in Leuser are the deer which include the whistlers, white-eyes, leafbirds, sunbirds, tailorbirds, fantail, forktails, needletails, wagtails, doves, pigeons, quails, partridges, pheasants, cuckoos, parakeets, parrots, bitterns, herons, finfoots, ducks, snipes, sandpipers, waders, falcons, hawks, nightjars, owls, serpent eagles, hawk eagles, fish eagles, sea eagles, and many more.
