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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 (1963)	present	A1, A2
Dark-eared Brown-dove Phapitreron brunneiceps	VU	resident (1963)	present	A1, A2
Philippine Spinetail Mearnsia picina	NT	resident (1952)	present	A2
Japanese Night Heron Gorsachius goisagi	VU	winter (1963)	present	A1
Giant Scops-owl Otus gurneyi	VU	resident (1963)	present	A1, A2
Mindanao Highland Scops-owl Otus mirus	LC	resident (1963)	present	A2
Philippine Eagle-owl Bubo philippensis	VU	resident (1963)	present	A1
Philippine Eagle Pithecophaga jefferyi	CR	resident (1963)	present	A1
Writhed Hornbill Rhabdotorrhinus leucocephalus	NT	resident (1963)	present	A2
South Philippine Dwarf-Kingfisher Ceyx mindanensis	LC	resident (1993)	present	A1
Southern Silvery Kingfisher Ceyx argentatus	NT	resident (1993)	present	A1, A2
Blue-capped Kingfisher Actenoides hombroni	LC	resident (1952–1963)	present	A1, A2
Philippine Cockatoo Cacatua haematuropygia	CR	resident (1970–1979)	present	A1
Mindanao Racquet-tail Prioniturus waterstradti	NT	resident (1963)	present	A2
Azure-breasted Pitta Pitta steerii	VU	resident (1963)	present	A1, A2
Mindanao Wattled Broadbill Sarcophanops steerii	VU	resident (1963)	frequent	A1, A2
Black-and-cinnamon Fantail Rhipidura nigrocinnamomea	LC	resident (1961)	abundant	A2
Short-crested Monarch Hypothymis helenae	NT	resident (1963)	present	A2
Celestial Monarch Hypothymis coelestis	VU	resident (1963)	present	A1, A2
White-fronted Tit Sittiparus semilarvatus	NT	resident (1952)	present	A2
Black-headed Tailorbird Orthotomus nigriceps	LC	resident (1900–1930)	present	A2
Yellowish Bulbul Hypsipetes everetti	LC	resident (1900–1930)	present	A2
Rusty-crowned Babbler Sterrhoptilus capitalis	LC	resident (1963)	present	A2
Mindanao White-eye Heleia goodfellowi	LC	resident (1952)	present	A2
Mindanao Pygmy Babbler Dasycrotapha plateni	NT	resident (1952)	present	A2
Little Slaty Flycatcher Ficedula basilanica	VU	resident (1993)	present	A1, A2
Cryptic Flycatcher Ficedula crypta	LC	resident (1952)	present	A2
Philippine Leafbird Chloropsis flavipennis	VU	resident (1963)	present	A1, A2
Olive-capped Flowerpecker Dicaeum nigrilore	LC	resident (1952)	present	A2
Dicaeum anthonyi	NR	resident (1950–1980)	present	A2
Grey-hooded Sunbird Aethopyga primigenia	LC	resident (1952)	present	A2
Red-eared Parrotfinch Erythrura coloria	LC	resident (1963)	present	A2
Cinnamon Ibon Hypocryptadius cinnamomeus	LC	resident (1952)	present	A2
White-cheeked Bullfinch Pyrrhula leucogenis	LC	resident (1950–1980)	present	A2

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2001. The most recent assessment (2018) is shown below.

State (condition of the trigger species' habitats)
Habitat	Quantity (% remaining)	Quality (% carrying capacity)	Result
Forest	-	very poor (<40%)	very poor

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Energy production and mining	happe­ning now	most of popul­ation/area (50–90%)	rapid decline (>30% over 3 gener­ations)	very high
Human intrusions and disturbance	happe­ning now	most of popul­ation/area (50–90%)	moderate decline (10–30% over 3 gener­ations)	high
Biological resource use	happe­ning now	most of popul­ation/area (50–90%)	moderate decline (10–30% over 3 gener­ations)	high
Agricultural expansion and intensification	happe­ning now	some of popul­ation/area (10–49%)	moderate decline (10–30% over 3 gener­ations)	high
Transportation and service corridors	happe­ning now	some of popul­ation/area (10–49%)	slow decline (1–10% over 3 gener­ations)	medium

Response (conservation actions taken for the trigger species and/or their habitats)
Designation	Planning	Action	Result
Most of area (50–90%) covered (including the most critical parts for important bird species)	A management plan exists, but it is out of date or not compre­hensive	Substantive conservation measures are being implemented, but these are not compre­hensive and are limited by resources and capacity	medium

Year	Protected Area	Designation (management category)	% coverage of IBA
1991	Cabadbaran	Watershed Forest Reserve (VI)	4
1991	Andanan River	Watershed Forest Reserve (V)	3
2009	Alamio, Buyaan, Carac-an, Panikian Rivers and Sipangpang Falls	Watershed Forest Reserve (V)	10

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

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Mount Hilong-hilong (Philippines). Downloaded from https://datazone.birdlife.org/site/factsheet/mount-hilong-hilong-iba-philippines on 22/12/2024.