The site was identified as important in 2001 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.Populations meeting IBA criteria ('trigger species'):
|Species||Current IUCN Red List Category||Season||Year(s)||Population estimate at site||IBA criteria met|
|Visayan Hornbill Penelopides panini||EN||resident||1990-1999||present||A1, A2|
|White-winged Cicadabird Edolisoma ostentum||VU||resident||1991||frequent||A1, A2|
|Flame-templed Babbler Dasycrotapha speciosa||EN||resident||1991||present||A1, A2|
|White-throated Jungle-flycatcher Vauriella albigularis||EN||resident||1960-1969||present||A1, A2|
|Black-belted Flowerpecker Dicaeum haematostictum||LC||resident||1991||present||A1, A2|
|Green-faced Parrotfinch Erythrura viridifacies||VU||resident||1960-1969||present||A1, A2|
The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2001).
|Protected area (PA)||PA designation||PA area (ha)||Relationship of PA with IBA||Overlap of PA with IBA (ha)|
|Northern Negros||Natural Park||80,454||protected area overlaps with site||0|
|North Negros Forest Reserve||Other||80,454||protected area contains site||16,687|
|Bago||Watershed Forest Reserve||63,461||protected area overlaps with site||16,687|
|Habitat (IUCN level 1)||Habitat detail||Extent (% of site)|
BirdLife International (2023) Important Bird Area factsheet: Mount Silay and Mount Mandalagan (Northern Negros). Downloaded from http://datazone.birdlife.org/site/factsheet/mount-silay-and-mount-mandalagan-(northern-negros)-iba-philippines on 01/10/2023.