|Central coordinates||22o 11.00' East 53o 7.00' North|
|IBA criteria||C1, C6|
|Altitude||100 - 120m|
|Year of IBA assessment||2010|
Site description The site comprises the Narew river valley between the drained Wizna marshes and the town of £om¿a. The valley is narrow (up to 1.2 km wide) and deeply cut into the plain, with a close to natural character. The valley bottom is covered mainly by peat, to varying depths. There are yearly floods, especially in spring. Flood-plain vegetation includes submerged waterweed (e.g. Potamogeton), reedbeds Phragmites, meadows, sedge-beds, dry sandy grassland, and fragmented forest of alder Alnus. Valley slopes are covered with oak Quercus forest, above which is patchy dry-ground forest of lime Tilia and hornbeam Carpinus.
Key Biodiversity A total of 178 species have been recorded, including 125 breeders. Breeding species of global conservation concern that do not meet IBA criteria: Haliaeetus albicilla (one pair), Crex crex.
|Species||Season||Period||Population estimate||Quality of estimate||IBA Criteria||IUCN Category|
|Corncrake Crex crex||breeding||2006||110-115 males only||good||C1||Least Concern|
|Great Snipe Gallinago media||breeding||1994||15 males only||-||C6||Near Threatened|
|Aquatic Warbler Acrocephalus paludicola||breeding||2006||9 males only||good||C1||Vulnerable|
|Protected area||Designation||Area (ha)||Relationship with IBA||Overlap with IBA (ha)|
|Bagno Wizna - PLB200005||Birds Directive||14,471||protected area is adjacent to site||0|
|Dolina Dolnej Narwi - PLB140014||Birds Directive||26,528||protected area is adjacent to site||0|
|Przelomowa Dolina Narwi - PLC200003||Birds Directive||0||protected area overlaps with site||4,317|
|IUCN habitat||Habitat detail||Extent (% of site)|
|Forest||Alluvial and very wet forest; Broadleaved deciduous woodland||10%|
|Grassland||Humid grasslands; Steppes and dry calcareous grassland||15%|
|Wetlands (inland)||Fens, transition mires and springs; Raised bogs; Rivers and streams; Standing freshwater; Water fringe vegetation||75%|
|Land-use||Extent (% of site)|
Protection status National None International None
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Recommended citation BirdLife International (2015) Important Bird Areas factsheet: Narew river gaps. Downloaded from http://www.birdlife.org on 04/05/2015
To provide new information to update this factsheet or to correct any errors, please email BirdLife