Manila Bay

IBA Criteria

Year of most recent IBA criteria assessment: 2001

Populations of IBA trigger species
Species Current IUCN Red List Category Season Year(s) of estimate Population estimate IBA Criteria Triggered
Philippine Duck Anas luzonica VU resident 1900-1919 present A1
Rufous Night-heron Nycticorax caledonicus LC non-breeding 1999 common A4i
Cattle Egret Bubulcus ibis LC non-breeding 1999 common A4i
Grey Heron Ardea cinerea LC non-breeding 1999 common A4i
Purple Heron Ardea purpurea LC non-breeding 1999 common A4i
Great White Egret Ardea alba LC non-breeding 1999 common A4i
Chinese Egret Egretta eulophotes VU non-breeding 1900-1949 present A1
Little Egret Egretta garzetta LC non-breeding 1999 common A4i
Pacific Golden Plover Pluvialis fulva LC winter 1987-1991 2,100 individuals A4i
Little Ringed Plover Charadrius dubius LC winter 1980 2,000 individuals A4i
Lesser Sandplover Charadrius mongolus LC winter 1980 5,000 individuals A4i
Kentish Plover Charadrius alexandrinus LC winter 1980 15,000 individuals A4i
Marsh Sandpiper Tringa stagnatilis LC winter 1987-1991 1,500 individuals A4i
Spotted Greenshank Tringa guttifer EN winter 1927 present A1
White-winged Tern Chlidonias leucopterus LC winter 1999 1,000 individuals A4i
Common Tern Sterna hirundo LC winter 1999 common A4i
Common Gull-billed Tern Gelochelidon nilotica LC winter 1999 2,000 individuals A4i
A4iii Species group - waterbirds n/a winter 1979-1982 32,000 individuals A4iii

Note: This table presents the IBA criteria triggered and the species that triggered then at the time of assessment, the current IUCN Red List category may vary from that which was in place at that time.

For more information about the IBA assessment process and criteria please click here


IUCN Habitat Habitat detail Extent (% of site)
Sea -
Wetlands (inland) -
Artificial/Terrestrial -
Coastline -
For further information about the habitat classification please click here.

Recommended citation
BirdLife International (2022) Important Bird Areas factsheet: Manila Bay. Downloaded from on 09/08/2022.