Located 30 km from Kuching, the Wetlands National Park was gazetted in 1992 and covers an area of 66.1 km2 on the estuarine reaches of the Sibu Laut and Salak rivers.

The park is the home of at least three predominantly arboreal primates; the endangered proboscis monkey (Nasalis larvatus), the long-tailed macaques and the silvered langurs.

Many jobs depend upon this habitat for the rich abundance of fish that are spawned and grow amongst the protection of the root systems.

The heavy decline in the proboscis monkey population caused by hunting, was largely arrested by the educational efforts of the Sarawak Forestry department protecting and banning the trade of these animals.

Extensive development predominantly housing but including quarrying and retail premises is occurring outside the parks boundary.