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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
Philippine Duck Anas luzonica	VU	resident (1990–1999)	uncommon	A1
Mindanao Bleeding-heart Gallicolumba crinigera	VU	resident (1991–1993)	present	A1, A2
Dark-eared Brown-dove Phapitreron brunneiceps	VU	resident (1990–1999)	present	A1, A2
Spotted Imperial-pigeon Ducula carola	VU	resident (1990–1999)	present	A1
Philippine Spinetail Mearnsia picina	NT	resident (1990–1999)	present	A2
Philippine Eagle Pithecophaga jefferyi	CR	resident (1977–1984)	present	A1
South Philippine Hawk-eagle Nisaetus pinskeri	EN	resident (1996)	present	A1
Writhed Hornbill Rhabdotorrhinus leucocephalus	NT	resident (1990–1999)	present	A2
Mindanao Hornbill Penelopides affinis	LC	resident (1990–1999)	present	A2
South Philippine Dwarf-Kingfisher Ceyx mindanensis	LC	resident (1990–1999)	present	A1
Southern Silvery Kingfisher Ceyx argentatus	NT	resident (1980–1999)	frequent	A1, A2
Blue-capped Kingfisher Actenoides hombroni	LC	resident (1990–1999)	present	A1, A2
Rufous-lored Kingfisher Todiramphus winchelli	VU	resident (1990–1999)	common	A1
Azure-breasted Pitta Pitta steerii	VU	resident (1990–1999)	present	A1, A2
Mindanao Wattled Broadbill Sarcophanops steerii	VU	resident (1990–1999)	present	A1, A2
Short-crested Monarch Hypothymis helenae	NT	resident (1990–1999)	present	A2
Celestial Monarch Hypothymis coelestis	VU	resident (1990–1999)	present	A1, A2
White-fronted Tit Sittiparus semilarvatus	NT	resident (1990–1999)	present	A2
Black-headed Tailorbird Orthotomus nigriceps	LC	resident (1990–1999)	uncommon	A2
Yellowish Bulbul Hypsipetes everetti	LC	resident (1990–1999)	common	A2
Rusty-crowned Babbler Sterrhoptilus capitalis	LC	resident (1990–1999)	present	A2
Mindanao Pygmy Babbler Dasycrotapha plateni	NT	resident (1990–1999)	present	A2
Striated Wren-babbler Ptilocichla mindanensis	LC	resident (1990–1999)	frequent	A2
Little Slaty Flycatcher Ficedula basilanica	VU	resident (1990–1999)	present	A1, A2
Philippine Leafbird Chloropsis flavipennis	VU	resident (1990–1999)	frequent	A1, A2

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

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