|Central coordinates||22o 52.00' East 53o 5.00' North|
|IBA criteria||C1, C4, C6|
|Altitude||107 - 122m|
|Year of IBA assessment||2010|
Site description A marshy stretch of the Narew valley, spanning 58 km between Sura¿ town and ¯ó³tki village, and from 300 m to 4 km wide. The valley has a natural character between Sura¿ and Rzêdziny towns and is periodically flooded. The Narew is a braided, meandering river, and creates a system which occupies the whole width of the valley floor in some places. There is a very rich mosaic of plant communitiesmainly beds of reed Phragmites and sedge Carex, alder Alnus forest and riverside scrub of willow Salix.
Key Biodiversity Breeding species of global conservation concern that do not meet IBA criteria: Aythya nyroca (formerly one pair, now extinct here), Gallinago media (6-8 pairs).
|Species||Season||Period||Population estimate||Quality of estimate||IBA Criteria||IUCN Category|
|Aquatic Warbler Acrocephalus paludicola||breeding||2009||38-40 males only||good||C1, C6||Vulnerable|
|A4iii Species group - waterbirds||passage||2009||16,000-25,000 individuals||good||C4|
|Protected area||Designation||Area (ha)||Relationship with IBA||Overlap with IBA (ha)|
|Bagienna Dolina Narwi - PLB200001||Birds Directive||23,471||protected area contained by site||23,471|
|Dolina Górnej Narwi - PLB200007||Birds Directive||18,384||protected area is adjacent to site||0|
|Narew River National Park||Wetlands of International Importance (Ramsar)||7,350||protected area contained by site||7,350|
|Narwianski PN||National Park||7,350||protected area contained by site||7,350|
|Narwianskie Bagna - PLH200002||Habitats Directive||6,823||protected area contained by site||6,823|
|Ostoja w Dolinie Górnej Narwi - PLH200010||Habitats Directive||20,307||protected area is adjacent to site||0|
|IUCN habitat||Habitat detail||Extent (% of site)|
|Forest||Alluvial and very wet forest; Broadleaved deciduous woodland; Mixed woodland; Native coniferous woodland||17%|
|Grassland||Humid grasslands; Mesophile grasslands; Steppes and dry calcareous grassland||23%|
|Wetlands (inland)||Fens, transition mires and springs; Raised bogs; Rivers and streams; Standing freshwater; Water fringe vegetation||22%|
|Artificial - terrestrial||Arable land; Highly improved re-seeded landscapes; Ruderal land||37%|
|Land-use||Extent (% of site)|
|nature conservation and research||78%|
Protection status National Partial International None7,350 ha of IBA covered by National Park (Narwiañski, 7,350 ha).
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Recommended citation BirdLife International (2015) Important Bird Areas factsheet: Marshy Valley of the Narew River. Downloaded from http://www.birdlife.org on 05/05/2015
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