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Location Philippines, Region X
Central coordinates 126o 2.00' East  9o 53.00' North
IBA criteria A1, A2
Area 67,726 ha
Altitude 0 - 290m
Year of IBA assessment 2001

Haribon Foundation

Site description This IBA includes the adjacent islands of Siargao and Bucas Grande Islands, which lie a few kilometers off the north-eastern coast of Mindanao. They are low-lying islands that rise to a maximum altitude of only 290 m. There are very extensive mangrove forests on the island, which cover a total of c. 8,700 ha. There are large areas of old growth lowland dipterocarp forest (reported to cover c.12% of the island) and secondary or residual forest (reported to cover 33% of the island), and areas of grassland (reported to cover 12% of the island).

Key Biodiversity Several of the threatened and restricted-range species of the Mindanao and Eastern Visayas Endemic Bird Area have been recorded on the island of Siargao, mainly during a collecting expedition in 1972, including Lesser Eagle-owl, Silvery Kingfisher and Wattled Broadbill. This IBA is particularly notable for the population of the critically endangered Philippine Cockatoo that survives there.

Non-bird biodiversity: Other threatened and endemic animals recorded on Siargao include the Saltwater Crocodile Crocodylus porosus, marine turtles (Hawksbill Turtle Eretmochelys imbricata, etc.), Philippine Tarsier Tarsius syrichta, Flying Lemur Cynocephalus volans and Dugong Dugong dugon. The interesting flora includes fire orchids, century orchids Dendrobium and Pitcher plants Nepenthes spp.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Giant Scops-owl Otus gurneyi resident  2001  present  A1  Vulnerable 
Alcedo argentata resident  2001  present  A1  Not Recognised 
Mindanao Broadbill Eurylaimus steerii resident  2001  present  A1  Vulnerable 
Philippine Cockatoo Cacatua haematuropygia resident  2001  present  A1  Critically Endangered 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Siargao Protected Landscape/Seascape 58,290 protected area contained by site 58,290  


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

Protection status Siargao Island was declared a Protected Landscape and Seascape in 1996 (with an area of 278,914.131 ha, and the coordinates: 9o30’-10o05’N 125o50’-126o15’E). It is a GEF CPPAP site (157,378 ha, of which 67,726 ha is terrestrial).

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Siargao Island Protected Landscape and Seascape. Downloaded from on 24/10/2016

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