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

Populations meeting IBA criteria ('trigger species') at the site:

Species	Red List	Season (year/s of estimate)	Size	IBA criteria
Mindanao Bleeding-heart Gallicolumba crinigera	VU	resident (1998)	present	A1, A2
Spotted Imperial-pigeon Ducula carola	VU	resident (1880–1900)	present	A1
Philippine Spinetail Mearnsia picina	NT	resident (1900–1930)	present	A2
Japanese Night Heron Gorsachius goisagi	VU	winter (1900–1919)	present	A1
Chinese Egret Egretta eulophotes	VU	non-breeding (1990–1999)	present	A1
Giant Scops-owl Otus gurneyi	VU	resident (1880–1900)	present	A1, A2
Philippine Eagle Pithecophaga jefferyi	CR	resident (1945)	frequent	A1
Writhed Hornbill Rhabdotorrhinus leucocephalus	NT	resident (1945)	present	A2
Mindanao Hornbill Penelopides affinis	LC	resident (1997–1998)	present	A2
South Philippine Dwarf-Kingfisher Ceyx mindanensis	LC	resident (1983–1993)	present	A1
Southern Silvery Kingfisher Ceyx argentatus	NT	resident (1880–1900)	present	A1, A2
Blue-capped Kingfisher Actenoides hombroni	LC	resident (1880–1900)	present	A1, A2
Rufous-lored Kingfisher Todiramphus winchelli	VU	resident (1900–1919)	present	A1
Philippine Cockatoo Cacatua haematuropygia	CR	resident (1880–1900)	present	A1
Azure-breasted Pitta Pitta steerii	VU	resident (1880–1900)	present	A1, A2
Mindanao Wattled Broadbill Sarcophanops steerii	VU	resident (1993)	present	A1, A2
Celestial Monarch Hypothymis coelestis	VU	resident (1880–1900)	present	A1, A2
White-eared Tailorbird Orthotomus cinereiceps	LC	resident (1990–1999)	present	A2
Zamboanga Bulbul Hypsipetes rufigularis	NT	resident (1990–1999)	common	A2
Striated Wren-babbler Ptilocichla mindanensis	LC	resident (1900–1949)	present	A2
Little Slaty Flycatcher Ficedula basilanica	VU	resident (1993)	present	A1, A2
Philippine Leafbird Chloropsis flavipennis	VU	resident (1998)	present	A1, A2
Dicaeum anthonyi	NR	resident (1997)	present	A2

Year	Protected Area	Designation (management category)	% coverage of IBA
1999	Pasonanca	Natural Park (II)	100

Habitat	% of IBA	Habitat detail
Forest	major (>10)
Artificial/Terrestrial	-

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Pasonanca watershed (Philippines). Downloaded from https://datazone.birdlife.org/site/factsheet/pasonanca-watershed-iba-philippines on 23/12/2024.