|Central coordinates||22o 21.00' East 52o 19.00' North|
|IBA criteria||C1, C2, C6|
|Altitude||85 - 116m|
|Year of IBA assessment||2010|
Ornithological information The site supports more breeding Charadrius hiaticula than any other inland site in Europe.
Site description The site contains the channel and valley of the Bug river between the Krzna river tributary and the Zegrzyñski reservoir (260 km), with adjacent extensive dry pastures. The whole area floods in spring. There are some swamps and mires at the mouths of tributaries entering the Bug. The river channel is generally natural, not too modified by man, so there are numerous bare sand islands and others overgrown with ruderal herbs or willow Salix scrub. Elsewhere there are also local remnants of willow or poplar Populus scrub. On the lowest river terrace there are numerous oxbow lakes, differing in size, depth and extent of aquatic vegetation (Potamogeton, Lemna).
|Species||Season||Period||Population estimate||Quality of estimate||IBA Criteria||IUCN Category|
|White Stork Ciconia ciconia||breeding||1996-1999||240-260 breeding pairs||good||C6||Least Concern|
|Western Marsh-harrier Circus aeruginosus||breeding||1996-1999||71-85 breeding pairs||-||C6||Least Concern|
|Montagu's Harrier Circus pygargus||breeding||1999||23-30 breeding pairs||-||C6||Least Concern|
|Corncrake Crex crex||breeding||1999||540-700 males only||-||C1, C6||Least Concern|
|Spotted Crake Porzana porzana||breeding||1999||50 males only||unknown||C6||Least Concern|
|Little Tern Sterna albifrons||breeding||1999||62-70 breeding pairs||-||C6||Least Concern|
|Black Tern Chlidonias niger||breeding||1998-1999||360-380 breeding pairs||-||C2, C6||Least Concern|
|Common Kingfisher Alcedo atthis||breeding||1999||82 breeding pairs||-||C6||Least Concern|
|Protected area||Designation||Area (ha)||Relationship with IBA||Overlap with IBA (ha)|
|Dolina Dolnego Bugu - PLB140001||Birds Directive||74,310||protected area contains site||73,380|
|Dolina Liwca - PLB140002||Birds Directive||27,432||protected area is adjacent to site||0|
|L/êg Dêbowy||Nature Reserve||133||protected area contained by site||133|
|Nadbuÿañski Obszar Chronionego Krajobrazu||Protected Landscape Area||55,300||protected area overlaps with site||17,500|
|Nadbuzanski Park Krajobrazowy||Landscape Park||57,768||protected area overlaps with site||33,000|
|Ostoja Nadbużanska - PLH140011||Habitats Directive||46,037||protected area overlaps with site||42,501|
|Ostoja Nadliwiecka - PLH140032||Habitats Directive||13,623||protected area is adjacent to site||0|
|Podlaski Przóom Bugu||Landscape Park||30,904||protected area overlaps with site||15,000|
|Puszcza Biata - PLB140007||Birds Directive||83,780||protected area is adjacent to site||0|
|Skarpa Moóo_ewska||Nature Reserve||2||protected area contained by site||2|
|Wydma Moóo_ewska||Nature Reserve||64||protected area contained by site||64|
|IUCN habitat||Habitat detail||Extent (% of site)|
|Forest||Alluvial and very wet forest||10%|
|Artificial landscapes (terrestrial)||20%|
|Grassland||Humid grasslands; Mesophile grasslands||60%|
|Wetlands (inland)||Fens, transition mires and springs; Rivers and streams; Standing freshwater; Water fringe vegetation||7%|
|Land-use||Extent (% of site)|
Management considerations Threats include dam-building, conversion of meadows to arable land, building of infrastructure for recreation, and reduced numbers of cattle with consequent reductions in extent of pasture.
Protection status National Partial International None133 ha of IBA covered by Nature Reserve (£êg Dêbowy, 133 ha). 2 ha of IBA covered by Nature Reserve (Skarpa Mo³o¿ewska, 2 ha). 64 ha of IBA covered by Nature Reserve (Wydma Mo³o¿ewska, 64 ha). 33,000 ha of IBA covered by Landscape Park (Nadbu¿añski, 53,680 ha). 15,000 ha of IBA covered by Landscape Park (Podlaski Prze³om Bugu, 30,904 ha). 17,500 ha of IBA covered by Protected Landscape Area (Nadbu¿añski, 55,300 ha).
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Recommended citation BirdLife International (2013) Important Bird Areas factsheet: Lower Bug river valley. Downloaded from http://www.birdlife.org on 26/05/2013
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