Lower Bug river valley

Country/territory: Poland

IBA criteria met: C1, C2, C6 (2010)
For more information about IBA criteria, please click here

Area: 73,380 ha

Ogólnopolskie Towarzystwo Ochrony Ptaków
IBA conservation status
Year of assessment (most recent) State (condition) Pressure (threat) Response (action)
2009 not assessed very high low
For more information about IBA monitoring, please click here

Site description (2000 baseline)
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).

Key biodiversity
The site supports more breeding Charadrius hiaticula than any other inland site in Europe.

Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Lower Bug river valley. Downloaded from on 22/02/2024.