Hutan Kahaylan (2°33′S 113°42′E﻿ / ﻿2.55°S 113.7°E﻿ / -2.55; 113.7﻿ (Hutan Kahaylan)) is a peat swamp forest of about 150,000 hectares between the Kastingen and Kahayan rivers that so far has suffered least from the Mega Rice Project, although it has been badly damaged. Because it is close to the regional capital Palangkaraya it is still at risk. Vulnerable bird species include the large green pigeon (Treron capellei) and possibly Storm's stork (Ciconia stormi) and lesser adjutant (Leptoptilus javanicus).[12] The Sabangau Forest is centered on the blackwater Sabangau River.