Manila Bay

IBA Justification

The site was identified as important in 2001 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species'):
Species Current IUCN Red List Category Season Year(s) Population estimate at site IBA criteria met
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
Chinese Crested Tern Thalasseus bernsteini CR non-breeding 1905 present A1
A4iii Species group - waterbirds n/a winter 1979-1982 32,000 individuals A4iii

The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2001).


Habitat (IUCN level 1) Habitat detail Extent (% of site)
Marine Coastal/Supratidal -
Artificial/Aquatic & Marine Other artificial wetlands, Saltpans -
Artificial/Terrestrial -
Marine Intertidal -
Marine Neritic -
For more information about the IUCN Habitat classification, please click here.

Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Manila Bay. Downloaded from on 24/09/2023.