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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
Spotted Imperial-pigeon Ducula carola	VU	resident (1997)	present	A1
Giant Scops-owl Otus gurneyi	VU	resident (1994)	present	A1, A2
Philippine Eagle Pithecophaga jefferyi	CR	resident (1967–1979)	present	A1
South Philippine Hawk-eagle Nisaetus pinskeri	EN	resident (1997)	present	A1
Writhed Hornbill Rhabdotorrhinus leucocephalus	NT	resident (1994)	present	A2
Mindanao Hornbill Penelopides affinis	LC	resident (1997)	common	A2
South Philippine Dwarf-Kingfisher Ceyx mindanensis	LC	resident (1997)	present	A1
Blue-capped Kingfisher Actenoides hombroni	LC	resident (1994)	present	A1, A2
Micromacronus leytensis	NR	resident (1996–1997)	present	A2
Long-tailed Grasshopper-warbler Locustella caudata	LC	resident (1990–1999)	present	A2
Yellowish Bulbul Hypsipetes everetti	LC	resident (1997)	present	A2
Rusty-crowned Babbler Sterrhoptilus capitalis	LC	resident (1900–1930)	present	A2
Mindanao Pygmy Babbler Dasycrotapha plateni	NT	resident (1990–1999)	present	A2
Little Slaty Flycatcher Ficedula basilanica	VU	resident (1994)	present	A1, A2
Cryptic Flycatcher Ficedula crypta	LC	resident (1997)	present	A2
Dicaeum anthonyi	NR	resident (1987)	present	A2
Dicaeum anthonyi	NR	resident (1987–1997)	present	A2
Lina's Sunbird Aethopyga linaraborae	NT	resident (1994)	common	A2
Grey-hooded Sunbird Aethopyga primigenia	LC	resident (1988)	present	A2
Apo Sunbird Aethopyga boltoni	LC	resident (1987)	present	A2
Red-eared Parrotfinch Erythrura coloria	LC	resident (1994)	present	A2

Year	Protected Area	Designation (management category)	% coverage of IBA
2011	Aliwagwag	Protected Landscape (V)	12

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

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Mount Agtuuganon and Mount Pasian (Philippines). Downloaded from https://datazone.birdlife.org/site/factsheet/mount-agtuuganon-and-mount-pasian-iba-philippines on 23/12/2024.