email a friend
printable version
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.

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 

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  


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

Contribute  Please click here to help BirdLife conserve the world's birds - your data for this IBA and others are vital for helping protect the environment.

Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Middle Bug river valley. Downloaded from on 24/10/2014

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