Pulau Dua

IBA Justification

The site was identified as important in 1999 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
Milky Stork Mycteria cinerea EN breeding 1984 10-30 individuals A1
Royal Spoonbill Platalea regia LC breeding 1970-1979 present A4i
Black-headed Ibis Threskiornis melanocephalus NT breeding 1970-1979 present A4i
Cattle Egret Bubulcus ibis LC breeding 1985 present A4i
Christmas Island Frigatebird Fregata andrewsi VU non-breeding 1987-1998 present A1
Little Cormorant Microcarbo niger LC breeding 1985 present A4i
Little Black Cormorant Phalacrocorax sulcirostris LC breeding 1985 present A4i
Oriental Darter Anhinga melanogaster NT breeding 1970-1979 present A4i
A4iii Species group - waterbirds n/a breeding 1985 min 7,500 breeding pairs A4iii

The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (1999).

IBA Protection

Protected area (PA) PA designation PA area (ha) Relationship of PA with IBA Overlap of PA with IBA (ha)
Pulau Kasa Suaka Margasatwa 33 is identical to site 30
Pulau Dana Cagar Alam 1,000 protected area overlaps with site 0


Habitat (IUCN level 1) Habitat detail Extent (% of site)
Forest -
Wetlands (inland) Sand dunes and beaches -
Shrubland -
Other -
For more information about the IUCN Habitat classification, please click here.

Land use

Land-use Extent (% of site)
nature conservation and research -

Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Pulau Dua. Downloaded from on 28/09/2023.