Current view: Text account
Site description (2000 baseline):
Site location and context
A storage reservoir (777 ha) on the Samica river, connected by the Wonieœæ channel to the Obra river. The reservoir comprises five former lakes (Drzeczkowskie, Witos³awskie, Wojnowskie, Jezierzyckie, Wonieœæ), connected by a narrow channel (c.13 km long, 200-1,300 m wide), with meadows between them. A dam and sluice divide the upper part of the reservoir, where aquatic vegetation is well-developed, from the lower, where such vegetation is very localized. Adjacent there are fish-ponds, forests, meadows and cultivated fields. The reservoir stores water for agriculture and fire-fighting.
The globally threatened
Aythya nyroca has not bred here since 1995, but the habitat remains and it is believed there is a good chance that it could breed here again, therefore criterion B2 is still applied. Breeding species of global conservation concern that do not meet IBA criteria:
Haliaeetus albicilla (one pair). Other notable breeding species include
Anas strepera (22 pairs) and
Chlidonias niger (20-60 pairs).
Pressure/threats to key biodiversity
Birds are disturbed by fisheries, hunting, tourism and angling, and are also threatened by rapid changes in water-level.
National High
International None900 ha of IBA covered by Protected Landscape Area (Krzywiñsko-Osiecki, 71,425 ha).
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Woniesc reservoir (Poland). Downloaded from
https://datazone.birdlife.org/site/factsheet/woniesc-reservoir-iba-poland on 26/12/2024.
