The 3,206-hectare Bukit Timah and Central Catchment Nature Reserves represent the last and only extensive pieces of Singapore's primary and mature secondary forests. NParks carries out active management of these nature reserves through reforestation programmes, removal of invasive creepers, and overseeing the overall health of these reserves.
Sungei Buloh Wetland Reserve, Singapore's first ASEAN Heritage Park, meanwhile, is located at the northwestern coast of the country. A site of international importance for migratory birds, it covers 130 hectars and was developed from vacated prawn farms into a nature park and bird sanctuary for both resident and migratory birds.
NParks ensures the health of these designated nature areas, which includes the gazette nature reserves. It monitors and documents the biodiversity of these nature areas which are conserved and promoted as wildlife sanctuaries, and as valuable resources for education and outdoor recreational activities.
For more information, please refer to this website
http://www.nparks.gov.sg/cms/