Data Zone
Country/territory: Poland
IBA criteria met: C3, C4, C6 (2010)
For more information about IBA criteria, please click here
Area: 2,738 ha
| IBA conservation status | |||
|---|---|---|---|
| Year of assessment (most recent) | State (condition) | Pressure (threat) | Response (action) |
| 2010 | favourable | very high | low |
| For more information about IBA monitoring, please click here | |||
Site description (2000 baseline)
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.
Key biodiversity
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).
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 22/11/2024.