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Location Philippines, Region IV
Central coordinates 121o 57.00' East  13o 25.00' North
IBA criteria A1, A2
Area 10,000 ha
Altitude 0 - 1,153m
Year of IBA assessment 2001

Haribon Foundation

Site description Marinduque is an island of 172,700 ha off the southwestern coast of Luzon. It is hilly and reaches a maximum altitude of 1,153 m. Two small blocks of old growth forest are shown on recent forest cover maps around the highest peaks in the center and south of the island. Most of the forest remaining on the island is likely to be lowland in type, with some montane forest above c.1,000 m. This IBA includes the small Torrijos Watershed Reserve, which has an area of 105 ha.

Key Biodiversity Several of the threatened and restricted-range birds of the Luzon Endemic Bird Area have been recorded on Marinduque, but the ornithological coverage there appears to have been rather sparse and more survey work may locate more of these species. There is a population of the threatened Green Racquet-tail on the island, but it is believed to be small. Six subspecies of birds are endemic to Marinduque, Amethyst Brown-dove Phapitreron amethystina imeldae, Blackish Cuckoo-shrike (see above), White-browed Shama Copsychus luzoniensis shemleyi, Mangrove Blue Flycatcher Cyornis rufigastra marinduquensis, Purple-throated Sunbird Nectarinia sperata marinduquensis and Mountain White-eye Zosterops montanus gilli.

Non-bird biodiversity: Threatened endemic mammals recorded on Marinduque include the Philippine Pygmy Fruit Bat Haplonycteris fischeri and the Southern Luzon Giant Cloud Rat Phloeomys cumingi, which was last recorded in 1890 but may still be present in the area. The Philippine Warty Pig Sus philippensis, which used to be common is now extinct in this IBA. Other endemic mammals like Philippine Pygmy Roundleaf Bat Hipposideros pygmaeus, Philippine Nectar Bat Eonycteris robusta and Large Rufous Horseshoe Bat Rhinolophus rufus are also found in this IBA. Endemic herpetofauna so far recorded in this IBA are Giant Philippine Frog Rana magna macrocephala and Truncate-toed Chorus Frog Kaloula conjuncta. The waters around Marinduque are also known to support threatened animals, such as Olive Ridley Turtle Lepidochelys olivacea, Green Turtle Chelonia mydas, Hawksbill Turtle Eretmochelys imbricata and Spinner Dolphin Stenella longirostris.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Philippine Duck Anas luzonica resident  2001  present  A1  Vulnerable 
Green Racquet-tail Prioniturus luconensis resident  2001  present  A1  Endangered 
Philippine Cockatoo Cacatua haematuropygia resident  2001  present  A1  Critically Endangered 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Marinduque Wilderness Sanctuary 8,828 protected area contained by site 8,828  
Torrijos Watershed Forest Reserve 112 protected area contained by site 112  


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

Protection status The IBA includes the small (105 ha) Torrijos Watershed Forest Reserve established by virtue of Proc. No. 463 on 6 April 1932.

References Alcala and Brown (1998).

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Marinduque Wildlife Sanctuary. Downloaded from on 24/10/2016

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