Loagan Bunut National Park features a unique ecosystem based on Sarawak’s largest natural lake (65 ha). The shallow lake usually drains completely when the water in the nearby Tinjar river is low (normally February and late May or early June/July).
As the water level subsides, huge flocks of wading birds gorge themselves on fish and other aquatic creatures trapped in the mud.
When the lake is dry, plants sprout from the mud and are eaten by insect larvae. When the rains come and the lake fills up, returning fish feed on the larvae, breed in the lake, and the whole cycle starts again.