The Ramsar Convention on Wetlands of International Improtance is an intergovernmental treaty that provides the framework for national action and international cooperation for the conservation and wise use of wetlands and their resources.

The Convention's mission is on "the conservation and wise use of all wetlands through local and national actions and international cooperation, as a contribution towards achieving sustainable devleopment throughout the world."

Olango Island Wildlife Sanctuary (RSN0656)

Lapu-Lapu, Cebu
Designation date: July 1, 1994

Olango Island is a low-lying island surrounded by extensive intertidal sandflats, mangroves, seagrass beds, coral reefs and islets. It is one of the most important areas in the country for significant numbers of migratory waterbirds, providing habitat for staging, wintering, roosting and feeding birds. The site is also considered as the most important area for the rare waterbird species Asiatic Dowitcher

Naujan Lake National Park (RSN1008)

Naujan, Oriental Mindoro
Designation Date: November 12, 1999

Naujan Lake is the 5th largest lake in the Philippines (14km by 7km) and has 14 species of fish, five of them migratory, and is an important feeding or wintering area for large numbers of ducks and other waterbirds such as herons, egrets, rails, and bitterns. The rare Plain swamphen (Amaurornis olivaceous) is also found, as well as an endemic species of freshwater crocodile (Crocodylus mindorensis). 

Agusan Marsh Wildlife Sanctuary (RSN1009)

Agusan del Sur
Designation Date: November 12, 1999

The marsh is a vast complex of freshwater marshes and watercourses with numerous shallow lakes and ponds in the upper basin of the Agusan River and its tributaries, which rise in the hills of eastern Mindanao. Some parts of the marsh have been converted into fishponds and rice paddies. The site acts as storage for rain water and reduces the downstream flow of flood water into Butuan City and other population centers. The Marsh supports the largest expanses left in the Philippines of seven habitat types and includes a very large area of swamp forest and a peat swamp forest not found anywhere else in the country.

Tubbataha Reefs Natural Park (RSN1010)

Cagayancillo, Palawan
Designation Date: November 12, 1999

Aside from being a Ramsar Site, Tubbata Reefs Natural Park is also designated as a National Marine Park and World Heritage Site. The wetland boasts its pristine coral reefs with high diversity of at least 359 species of corals (equivalent to about 80% of all coral species in the Philippines) and hosts 600 species of fish, 7 species of seagrass, and 13 species of sharks and two species of marine turtles.

Puerto Princesa Subterranean River National Park (RSN2084)

Puerto Princesa City, Palawan
Designation Date: June 30, 2012

This site is also a National Park, National Geological Site, ASEAN Heritage Park, UNESCO Biosphere Reserve and World Heritage Site. The site connects a range of important ecosystems from the mountain-to-the-sea, including a limestone karst landscape with a complex cave system, mangrove forests, lowland evergreen tropical rainforests, and freshwater swamps. It is home to about 800 plant and 233 animal species, including the critically endangered Philippine cockatoo (Cacatua haematuropygia) and Hawksbill turtle (Eretmochelys imbricate), as well as the endangered Green sea turtle (Chelonia mydas) and Nordmanns greenshank (Tringa guttifer). There are also some 15 endemic species of birds such as the Palawan peacock pheasant (Polyplectron emphanum) and the Tabon scrub fowl (Megapodius freycinet cumingii). 

Las Piñas- Parañaque Critical Habitat and Ecotourism Area (RSN2124)

Metro Manila
Designation Date: March 15, 2013

This is a coastal wetland in Manila Bay situated within the metropolis of Manila, comprising two interconnected, mangrove-covered islands, and shallow lagoons and coastline. A Presidential Proclamation in 2007 designated the site as a Critical Habitat for the survival of threatened, restricted-range and congregatory species. At least 5,000 individuals of migratory and resident birds have been recorded at the site, including about 47 migratory species such as the vulnerable Chinese Egret (Egretta eulophotes). The most important of the resident bird species is the vulnerable Philippine Duck (Anas luzonica) which breeds at the site. 

Negros Occidental Coastal Wetlands Conservation Area (RSN2271)

Negros Occidental, Negors Island Region
Designation ate: October 20, 2016

This hosts three globally threatened marine turtles, the critically endangered hawksbill turtle (Eretmochelys imbricata), the endangered green turtle (Chelonia mydas) and the vulnerable olive ridley turtle (Lepidochelys olivacea). The vulnerable Irrawaddy dolphin (Orcaella brevirostris) also inhabits the coastal areas. Among the waterbird species recorded in the NOCWCA in 2014 include the globally endangered great knot (Calidris tenuirostris), far eastern curlew (Numenius madagascariensis) and spotted greenshank (Tringa guttifer). There are three other vulnerable species: the Philippine duck (Anas luzonica) which is endemic to the Philippines, Chinese egret (Egretta eulophotes) and Java sparrow (Lonchura oryzivora).

Sasmuan Pampanga Coastal Wetlands (RSN2445)

This Ramsar Site is recognized as an important refuelling station for migratory birds while also catering to resident ones. In 2018. the municipality of Sasmuan received 46.4% of the total waterbirds that frequent the country as part of the East Asaian-Australasian Flyway. In 2020, the Annual Waterbird Count recorded a total bird population of 50,230. which represents 27 species. Among these are the globally endangered spotted greenshank, black-faced spoonbill and Far Eastern curlew, the vulnerable Chinese egret and Philippine duck, and the near threatened Asian dowitcher. Aside from the Philippine duck, other species endemic to the country and present at the site are the grey-backed tailorbird and the Philippine pied-fantail.