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Location Poland, lubelskie
Central coordinates 23o 38.00' East  51o 20.00' North
IBA criteria C1, C6
Area 29,780 ha
Altitude 128 - 179m
Year of IBA assessment 2010

Ogólnopolskie Towarzystwo Ochrony Ptaków



Site description A 340 km long stretch of the Bug river valley along the border with Ukraine and Belarus, from Go³êbie village (where the Bug enters Poland) to the mouth of the Krzna tributary. The main tributaries flowing into the Bug along this stretch are (largest first) the Huczwa, We³nianka, Udal, Uherka, W³odawka and Hanna. This stretch is 2-3 km wide, and includes the Husynne storage reservoir on the Udal tributary. The channel of the Bug is deeply incised and has a natural character (no dredging or regulating work has been undertaken), while the relatively flat valley is covered by meadows with variably wet soils, small areas of degraded riverside forest of alder Alnus and willow Salix scrub, and arable land. Oxbow lakes are common. Husynne reservoir (112 ha, 2.5 m deep) is half-overgrown with reedbeds Phragmites and water-soldier Pistia.

Key Biodiversity Other breeding species include Actitis hypoleucos and Alcedo atthis.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Montagu's Harrier Circus pygargus breeding  1995-2003  30 breeding pairs  good  C6  Least Concern 
Corncrake Crex crex breeding  1999  300-350 males only  C1, C6  Least Concern 
Black-tailed Godwit Limosa limosa passage  2004-2009  30 individuals  good  C1  Near Threatened 
Black Tern Chlidonias niger breeding  2004-2009  50-80 breeding pairs  poor  C6  Least Concern 
Common Kingfisher Alcedo atthis breeding  1995-2003  110-140 breeding pairs  good  C6  Least Concern 
Syrian Woodpecker Dendrocopos syriacus breeding  1996-2009  40-100 breeding pairs  unknown  C6  Least Concern 
Aquatic Warbler Acrocephalus paludicola breeding  2009  48 males only  good  C1, C6  Vulnerable 

IBA Monitoring

2010 very high near favourable not assessed
Population
Medium - based upon reliable but incomplete / partially representative data

Agricultural expansion and intensification marine and freshwater aquaculture - subsistence/artisinal aquaculture happening now whole area/population (>90%) very rapid to severe deterioration very high
Agricultural expansion and intensification wood and pulp plantations (includes afforestation) - small-holder plantations happening now small area/few individuals (<10%) slow but significant deterioration low
Climate change and severe weather storms and floods happening now majority/most of area/population (50-90%) no or imperceptible deterioration low
Energy production and mining renewable energy happening now whole area/population (>90%) moderate to rapid deterioration very high
Human intrusions and disturbance recreational activities likely in short term (within 4 years) majority/most of area/population (50-90%) no or imperceptible deterioration low
Natural system modifications other ecosystem modifications happening now majority/most of area/population (50-90%) slow but significant deterioration high
No known threats no known threats happening now small area/few individuals (<10%) no or imperceptible deterioration low
Over-exploitation, persecution and control of species direct mortality of trigger species - hunting and trapping happening now majority/most of area/population (50-90%) moderate to rapid deterioration high
Residential and commercial development tourism and recreation areas happening now some of area/population (10-49%) slow but significant deterioration medium
Transportation and service corridors utility & service lines happening now whole area/population (>90%) moderate to rapid deterioration very high

Grassland   0 0 moderate (70-90%) moderate (70-90%) unfavourable

Chlidonias niger Black Tern 80 57 breeding pairs 72 near favourable

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Dolina Srodkowego Bugu - PLB060003 Birds Directive 28,097 protected area overlaps with site 25,361  
Poleska Dolina Bugu - PLH060032 Habitats Directive 8,173 protected area contained by site 8,173  
Zachodniowotynska Dolina Bugu - PLH060035 Habitats Directive 1,556 protected area overlaps with site 1,473  

Habitats

IUCN habitat Habitat detail Extent (% of site)
Forest Alluvial and very wet forest; Broadleaved deciduous woodland; Mixed woodland; Native coniferous woodland  10%
Other   3%
Grassland Humid grasslands; Mesophile grasslands; Steppes and dry calcareous grassland  51%
Wetlands (inland) Fens, transition mires and springs; Rivers and streams; Standing freshwater; Water fringe vegetation  2%
Artificial - terrestrial Arable land; Highly improved re-seeded landscapes; Other urban and industrial areas; Ruderal land  34%

Land use

Land-use Extent (% of site)
agriculture 75%
forestry 5%
urban/industrial/transport 5%
not utilised 5%
nature conservation and research 30%
hunting -

Protection status National None International None

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Middle Bug river valley. Downloaded from http://www.birdlife.org on 23/11/2014

To provide new information to update this factsheet or to correct any errors, please email BirdLife