Data Zone
Country/territory: Poland
IBA criteria met: A4iii, B1i (2000)
For more information about IBA criteria, please click here
Area: 12,000 ha
Site description (baseline)
A dammed storage reservoir on the Narew river, with a maximum area of 3,300 ha. To the north the site extends to Kozieg³owy village, and includes the mouth of the Bug river. The northern and western shores are high and steep, but along the southern and eastern sides the reservoir is separated by river embankments from extensive cultivated meadows, which cover the former flood terrace. Important bird habitats here include oxbow lakes, islands and willow Salix bushes. The reservoir is used for recreation, and there are summer houses.
Key biodiversity
An important site for migrating waterbirds in autumn (c.20,000 in total, mainly ducks, swans, Fulica atra and gulls Larus) and also for wintering wildfowl (total 6,800). Breeding species of global conservation concern that do not meet IBA criteria: Crex crex (12 pairs).
Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Zegrzynski reservoir. Downloaded from
http://datazone.birdlife.org/site/factsheet/962 on 28/05/2023.
