Basilan Natural Biotic Area

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
Mindanao Bleeding-heart Gallicolumba crinigera VU resident 1900-1919 common A1, A2
Dark-eared Brown-dove Phapitreron brunneiceps VU resident 1937 present A1, A2
Chinese Egret Egretta eulophotes VU non-breeding 1900-1919 present A1
South Philippine Hawk-eagle Nisaetus pinskeri EN resident 1900-1919 present A1
Mindanao Hornbill Penelopides affinis LC resident 1900-1949 present A2
South Philippine Dwarf-Kingfisher Ceyx mindanensis VU resident 1979 present A1
Southern Silvery Kingfisher Ceyx argentatus NT resident 1926 present A1, A2
Rufous-lored Kingfisher Todiramphus winchelli VU resident 1937 present A1
Philippine Cockatoo Cacatua haematuropygia CR resident 1920-1929 present A1
Mindanao Wattled Broadbill Sarcophanops steerii VU resident 1937 present A1, A2
Celestial Monarch Hypothymis coelestis VU resident 1937 abundant A1, A2
White-eared Tailorbird Orthotomus cinereiceps LC resident 1937 present A2
Zamboanga Bulbul Hypsipetes rufigularis NT resident 1937 present A2
Rusty-crowned Babbler Sterrhoptilus capitalis LC resident 1900-1930 present A2
Striated Wren-babbler Ptilocichla mindanensis LC resident 1900-1930 present A2
Little Slaty Flycatcher Ficedula basilanica VU resident 1880-1900 present A1, A2

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

IBA Protection

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
Basilan Buffer Zone Natural Biotic Area - Buffer Zone 2,037 protected area contained by site 0
Basilan Natural Biotic Area 4,490 protected area contained by site 4,363


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

Recommended citation
BirdLife International (2022) Important Bird Areas factsheet: Basilan Natural Biotic Area. Downloaded from on 08/08/2022.