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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
Luzon Bleeding-heart Gallicolumba luzonica	NT	resident (1947)	rare	A2
Rufous Coucal Centropus unirufus	NT	resident (1947)	present	A2
Red-crested Malkoha Dasylophus superciliosus	LC	resident (1947)	present	A2
Scale-feathered Malkoha Lepidogrammus cumingi	LC	resident (1947)	present	A2
Spotted Buttonquail Turnix ocellatus	LC	resident (1947)	common	A2
North Philippine Hawk-eagle Nisaetus philippensis	EN	resident (1981)	present	A1
North Philippine Dwarf-kingfisher Ceyx melanurus	LC	resident (1947)	present	A1
Philippine Cockatoo Cacatua haematuropygia	CR	resident (1900)	present	A1
Green Racquet-tail Prioniturus luconensis	EN	resident (1947)	frequent	A1, A2
White-lored Oriole Oriolus albiloris	LC	resident (1961)	present	A2
Isabela Oriole Oriolus isabellae	CR	resident (1947)	present	A1, A2
Blackish Cicadabird Edolisoma coerulescens	LC	resident (1947)	present	A2
Celestial Monarch Hypothymis coelestis	VU	resident (1900–1919)	present	A1, A2
White-fronted Tit Sittiparus semilarvatus	NT	resident (1947)	rare	A2
Ijima's Leaf-warbler Phylloscopus ijimae	VU	winter (1947)	present	A1
Golden-crowned Babbler Sterrhoptilus dennistouni	NT	resident (1947)	present	A2
Luzon Striped Babbler Zosterornis striatus	LC	resident (1900–1949)	present	A2

Year	Protected Area	Designation (management category)	% coverage of IBA
1919	Mariveles	Watershed Forest Reserve (V)	100

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

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