|Location||Philippines, Region XIII|
|Central coordinates||125o 57.00' East 8o 9.00' North|
|IBA criteria||A1, A2, A4i|
|Altitude||40 - 50m|
|Year of IBA assessment||2001|
Site description Agusan Marsh is near Bunawan in the interior of north-eastern Mindanao Island, Agusan del Sur Province. It is a vast complex of freshwater marshes and watercourses with numerous small shallow lakes and ponds in the upper basin of the Agusan River and its tributaries. The rivers rise in the hills of eastern Mindanao and cause extensive flooding in the marshes from November to March. The main habitats of the marsh include freshwater swamp forest (c.49%), secondary scrub (c.14%), herbaceous swamp (c.7%), freshwater lakes, pools and rivers (c.10%), rice paddies and other agricultural land (c.6%) and small settlements (c.6%). Some parts of the marsh have been converted into fishponds. The main economic activities in the marsh are fishing, aquaculture and agriculture (mainly rice and cash crops), but the region is sparsely populated because of the annual flooding of the Agusan River. The marsh is an important source of water for irrigation. It has an important hydrological function, holding excess water at times of high flow, and ensuring adequate flow during dry periods. If the marsh were to be drained, the communities downstream would be prone to serious floods and droughts.
|Species||Season||Period||Population estimate||Quality of estimate||IBA Criteria||IUCN Category|
|Philippine Duck Anas luzonica||-||2001||present [units unknown]||-||A1, A4i||Vulnerable|
|Purple Heron Ardea purpurea||unknown||2001||present [units unknown]||-||A4i||Least Concern|
|Philippine Hawk-eagle Nisaetus philippensis||-||2001||present [units unknown]||-||A1||Vulnerable|
|Sarus Crane Grus antigone||-||2001||present [units unknown]||-||A1||Vulnerable|
|Spotted Imperial-pigeon Ducula carola||-||2001||present [units unknown]||-||A1||Vulnerable|
|Rufous-lored Kingfisher Todiramphus winchelli||-||2001||present [units unknown]||-||A1||Vulnerable|
|Silvery Kingfisher Alcedo argentata||-||2001||present [units unknown]||-||A1||Vulnerable|
|Celestial Monarch Hypothymis coelestis||-||2001||present [units unknown]||-||A1||Vulnerable|
|Protected area||Designation||Area (ha)||Relationship with IBA||Overlap with IBA (ha)|
|Agusan Marsh||Wilderness Sanctuary||42,009||protected area contains site||19,197|
|Agusan Marsh Wildlife Sanctuary||Wetlands of International Importance (Ramsar)||14,836||unknown||0|
|IUCN habitat||Habitat detail||Extent (% of site)|
|Artificial - terrestrial||-|
Other biodiversity The marshes support the largest population of the Estuarine Crocodile Crocodylus porosus remaining in the Philippines, and it has been suggested that the endangered Philippine Crocodile C. mindorensis may also be present
Protection status Agusan Marsh Wildlife Sanctuary was declared by Presidential Proclamation 913 in 31 October 1996. The area was given Ramsar site status in 1999. It is a GEF CPPAP site (including Esperanza).
References Davies et al. (1990); Scott (1989).
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Recommended citation BirdLife International (2014) Important Bird Areas factsheet: Agusan Marsh Wildlife Sanctuary. Downloaded from http://www.birdlife.org on 24/04/2014
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