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Location Philippines, Region III
Central coordinates 120o 29.00' East  14o 31.00' North
IBA criteria A1, A2
Area 23,688 ha
Altitude 0 - 1,420m
Year of IBA assessment 2001

Haribon Foundation



Site description The Mariveles Mountains are in southern Bataan province, near the entrance to Manila Bay (PH010), and rise steeply from sea level to 1,420 m. An area of forest is shown there on recent forest cover maps, which is reported to include both lowland and montane forest, including mossy forest. This includes old reforestation plantations in the former Lamao Arsenal and old growth forest at the peak of Mt Mariveles.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Philippine Cockatoo Cacatua haematuropygia resident  2001  present  A1  Critically Endangered 
Nisaetus philippensis resident  2001  present  A1  Not Recognised 
Green Racquet-tail Prioniturus luconensis resident  2001  present  A1  Endangered 
Ceyx melanurus resident  2001  present  A1  Not Recognised 
Isabela Oriole Oriolus isabellae resident  2001  present  A1  Critically Endangered 
Celestial Monarch Hypothymis coelestis resident  2001  present  A1  Vulnerable 
Izu Leaf-warbler Phylloscopus ijimae winter  2001  present  A1  Vulnerable 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Mariveles Watershed Forest Reserve 321 protected area contained by site 321  

Habitats

IUCN habitat Habitat detail Extent (% of site)
Forest   major
Artificial - terrestrial   -

Other biodiversity Baseline surveys of the mammals and herpetofauna have yet to be conducted in the area.

Protection status The Mariveles Watershed Forest Reserve was established through R.A. 3092 in July 1996. It is proposed as a Natural Park under the NIPAS.

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Mariveles mountains. Downloaded from http://www.birdlife.org on 18/09/2014

To provide new information to update this factsheet or to correct any errors, please email BirdLife