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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
Philippine Duck Anas luzonica	VU	resident	2001	min 100 individuals	A1, A4i
Spotted Imperial-pigeon Ducula carola	VU	resident	1976	present	A1
Sarus Crane Grus antigone	VU	breeding	1965	present	A1
Purple Heron Ardea purpurea	LC	resident	1999	present	A4i
South Philippine Hawk-eagle Nisaetus pinskeri	EN	resident	1989	present	A1
Southern Silvery Kingfisher Ceyx argentatus	NT	resident	1999	present	A1, A2
Rufous-lored Kingfisher Todiramphus winchelli	VU	resident	1900-1919	present	A1
Celestial Monarch Hypothymis coelestis	VU	resident	1900-1919	present	A1, A2

The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2001).

Pressure (threats to the trigger species and/or their habitats)
Threat level 1	Threat level 2	Timing	Scope	Severity	Result
Agricultural expansion and intensification	annual & perennial non-timber crops - small-holder farming	happening now	some of area/population (10-49%)	slow but significant deterioration	medium
Agricultural expansion and intensification	marine and freshwater aquaculture - subsistence/artisinal aquaculture	happening now	some of area/population (10-49%)	slow but significant deterioration	medium
Biological resource use	gathering terrestrial plants - unintentional effects (species being assessed is not the target)	happening now	some of area/population (10-49%)	slow but significant deterioration	medium
Biological resource use	hunting & collecting terrestrial animals - intentional use (species being assessed is the target)	happening now	majority/most of area/population (50-90%)	slow but significant deterioration	high
Biological resource use	logging & wood harvesting - unintentional effects: large scale	happening now	some of area/population (10-49%)	moderate to rapid deterioration	high
Natural system modifications	dams & water management/use - large dams	likely in long term (beyond 4 years)	some of area/population (10-49%)	no or imperceptible deterioration	low
Pollution	industrial & military effluents - seepage from mining	happening now	small area/few individuals (<10%)	slow but significant deterioration	low

Response (conservation actions taken for the trigger species and/or their habitats)
Protected-area designation	Management planning	Other conservation action	Result
Not assessed	Not assessed	Not assessed	not assessed

For more information about IBA conservation status, please click here

Protected area (PA)	PA designation	PA area (ha)	Relationship of PA with IBA	Overlap of PA with IBA (ha)
Agusan Marsh Wildlife Sanctuary	Ramsar Site, Wetland of International Importance	14,836	unknown	0
Agusan Marsh	Wildlife Sanctuary	14,836	protected area contains site	19,197

Habitat (IUCN level 1)	Habitat detail	Extent (% of site)
Forest		-
Wetlands (inland)		-
Artificial/Terrestrial		-

For more information about the IUCN Habitat classification, please click here.

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Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Agusan marsh. Downloaded from http://datazone.birdlife.org/site/factsheet/agusan-marsh-iba-philippines on 03/12/2023.