The area is located close to the coast, between Barumun river and the estuary of Rokan river near Bagansiapiapi.
Bird diversity in the area is not yet assessed through intensive study, only some rapid observations by A. Elliot and I. Martinez (look at Holmes 1996). Probability the Spot-billed Pelican Pelecanus philippensis breed in this site at Daun River. This bird maybe extinct in South-east Asia. The survey also found Lesser Adjutant Leptoptilus javanicus, described as common bird at the estuary of Rokan River, of which the population is under serious threat from hunting.The other survey by van Balen (1991) reported the existence of some important bird species such Storm's Stork Ciconia stormi, Large Green-Pigeon Treron capellei and probably Spotted Wood-owl Strix seluputo which need to reconfirmed.This area is probably important for mangrove specialist bird species.
Habitat and land use
Peat swamp forest (80%). Around 65% of this area is used for forestry and the remaining area for agriculture (25%) and oil mining (10%).
Pressure/threats to key biodiversity
Conversion of land for agriculture, logging and infrastructure development.
60000 ha of this area proposed as Bakau Selat Dumai Wildlife Sanctuary (Anon 1995)