|Location||Philippines, Region III,Region IV|
|Central coordinates||121o 22.00' East 14o 51.00' North|
|IBA criteria||A1, A2|
|Altitude||0 - 1,448m|
|Year of IBA assessment||2001|
Site description Mt Irid and Mt Angilo are located on the boundaries between the provinces of Bulacan, Quezon and Rizal, about 40 km to the north-east of Metro Manila, in the southern Sierra Madre mountains. Despite the close proximity to the city, there are very few roads into these rugged mountains, and they are sparsely populated. An extensive stand of what appeared to be old growth dipterocarp forest was located there (above 400 m) during a recent forest mapping survey (SOURCE?). Mt Irid rises to 1,448 m and Mt Angilo to 1,315 m, so there must be areas of montane forest around their peaks, but there are also likely to be substantial areas of lowland forest on the slopes.
Key Biodiversity This IBA is virtually unknown ornithologically, although there is an old record of Philippine Eagle near its western boundary. The extensive lowland and montane forests which are reported to remain there could prove to be important for the eagle, and to support populations of many of the other threatened and restricted-range birds of the Luzon Endemic Bird Area. The avifauna could prove to be similar to that of nearby Angat Dam (PH019) and the IBAs further north in the Sierra Madre.
Non-bird biodiversity: No mammal and herpetofaunal surveys have yet been conducted in this IBA.
|Species||Season||Period||Population estimate||Quality of estimate||IBA Criteria||IUCN Category|
|Philippine Eagle Pithecophaga jefferyi||resident||2001||present||-||A1||Critically Endangered|
|Good - based on reliable and complete / representative data|
|Agriculture and aquaculture||annual & perennial non-timber crops - agro-industry farming||happening now||majority/most of area/population (50-90%)||very rapid to severe deterioration||very high|
|Agriculture and aquaculture||annual & perennial non-timber crops - shifting agriculture||happening now||some of area/population (10-49%)||slow but significant deterioration||medium|
|Climate change and severe weather||storms and floods||happening now||whole area/population (>90%)||slow but significant deterioration||high|
|Energy production and mining||mining and quarrying||happening now||some of area/population (10-49%)||moderate to rapid deterioration||high|
|Human intrusions and disturbance||work and other activities||happening now||small area/few individuals (<10%)||slow but significant deterioration||low|
|Natural system modifications||dams & water management/use - large dams||likely in short term (within 4 years)||majority/most of area/population (50-90%)||very rapid to severe deterioration||high|
|Transportation and service corridors||roads and railroads||likely in long term (beyond 4 years)||majority/most of area/population (50-90%)||very rapid to severe deterioration||high|
|Pithecophaga jefferyi||Philippine Eagle||1||1||individuals||100||favourable|
|Most of site (50-90%) covered (including the most critical parts for important bird species)||A management plan exists but it is out of date or not comprehensive||Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity||medium|
|IUCN habitat||Habitat detail||Extent (% of site)|
|Artificial - terrestrial||-|
Protection status Not officially protected.
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Recommended citation BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Mounts Irid-Angilo and Binuang. Downloaded from http://www.birdlife.org on 25/10/2016
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