From October onwards, when the heavy rains gradually subside, plants begin to harbor new seeds, and ponds slowly drain to reveal an abundance of food for birds and animals for a short time, until the lagoons run completely dry in December.
A dipterocarp ecosystem and the dry-rainy season alternations make the majority of woody plants unable to adapt, leaving only a few typical species of Dipterocarpaceae. These species usually flourish during the rainy season to absorb nutrients, then lose their leaves in the dry season to conserve water.
Every year, millions of trees here perish, unable to cope with the harsh climates. This ecological transition inadvertently creates many dead trees and hollow trunks, which, coupled with the naturally rough barks of Dipterocarpaceae, make for ideal breeding grounds for common insects, ants, and termites. They effectively serve as a rich and sustainable food source for woodpeckers during both seasons. Of the 28 recorded woodpecker subspecies in Vietnam, up to 20 were found here.
Many of these subspecies have only a limited number of individuals left and are not found anywhere else in Vietnam.
Some woodpecker subspecies exclusive to dipterocarp forests are the rufous-bellied woodpecker, the greater yellownape, the streak-throated woodpecker, the black-headed woodpecker, the white-bellied woodpecker, and the great slaty woodpecker, which is considered vulnerable and in pressing need of conservation.