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close| Location | Poland, podlaskie |
| Central coordinates | 22o 11.00' East 53o 7.00' North |
| IBA criteria | C1, C6 |
| Area | 7,273 ha |
| Altitude | 100 - 120m |
| Year of IBA assessment | 2010 |
Ornithological information 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.
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.
Populations of IBA trigger species
| 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 areas
| 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 |
Habitats
| 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
| Land-use | Extent (% of site) |
|---|---|
| agriculture | 80% |
| tourism/recreation | 10% |
| forestry | 10% |
| hunting | - |
Management considerations A new bridge system is planned as part of a new ring road around £om¿a and poses a potential threat to the site.
Protection status National None International None
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Recommended citation BirdLife International (2013) Important Bird Areas factsheet: Narew river gaps. Downloaded from http://www.birdlife.org on 22/05/2013
To provide new information to update this factsheet or to correct any errors, please email BirdLife
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