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Location Philippines, Region IV
Central coordinates 120o 55.00' East  12o 48.00' North
IBA criteria A1, A2
Area 5,000 ha
Altitude 50 - 400m
Year of IBA assessment 2001

Haribon Foundation

Site description Siburan is the largest tract of lowland forest known on Mindoro. It is adjacent to the large Sablayan penal colony, which restricts access to the forest and therefore provides some degree of protection. The forest is about 30 km south-east of Sablayan, with forest on the south and east edge of the penal colony. This forest is contiguous with the patchy forests on the limestone ridge running north from Malpalon (PH043). In 1991, it was estimated that about 1,500 ha of lowland forest remains, with a similar area of unvisited montane forest further east. The lowland forest is generally closed canopy with trees of up to 25 m or more and a relatively open forest floor. There are fewer limestone outcrops causing less disruption to the canopy than at Malpalon. The small Lake Lubao borders the forest.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Philippine Duck Anas luzonica resident  1990-1999  present  A1  Vulnerable 
Mindoro Bleeding-heart Gallicolumba platenae resident  1990-1999  present  A1, A2  Critically Endangered 
Spotted Imperial-pigeon Ducula carola resident  1950-1959  present  A1  Vulnerable 
Black-hooded Coucal Centropus steerii resident  1990-1999  present  A1, A2  Critically Endangered 
Mindoro Hornbill Penelopides mindorensis resident  1990-1999  20 individuals  A1, A2  Endangered 
Scarlet-collared Flowerpecker Dicaeum retrocinctum resident  1990-1999  common  A1  Vulnerable 


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

Other biodiversity This IBA is likely to support endemic small mammals, etc., but surveys of the mammalian fauna and herpetofauna are yet to be conducted there.

Protection status Not officially protected.

Further web sources of information 

Alliance for Zero Extinction (AZE) species/site profile. This site has been identified as an AZE due to it containing a Critically Endangered or Endangered species with a limited range.

Related state of the world's birds case studies

References Brooks et al. (1995b); Dutson et al. (1992); Evans et al. (1993a).

Contribute  Please click here to help BirdLife conserve the world's birds - your data for this IBA and others are vital for helping protect the environment.

Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Mount Siburan. Downloaded from on 20/10/2014

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