Marshy valley of the Drweca river

Country/territory: Poland

IBA criteria met: C4, C7 (2010)
For more information about IBA criteria, please click here

Area: 3,136 ha

Ogólnopolskie Towarzystwo Ochrony Ptaków
IBA conservation status
Year of assessment (most recent) State (condition) Pressure (threat) Response (action)
2011 unfavourable not assessed not assessed
For more information about IBA monitoring, please click here

Site description (2000 baseline)
The site lies in the Drwêca river valley between Brodnica town and the road between Jajkowo and G³êboczek villages, and includes the lower parts of the Brynica and Samionka river valleys, Sopieñ lake and Ostrów lake. The valley is 600 m to 3 km in width and includes a canal system and oxbow lakes. The Drwêca river has a natural character and meanders strongly; overflow in early spring causes extensive flooding. The vegetation is species-rich; besides meadows there are reedbeds Phragmites, sedge-beds and small stands of alder Alnus woodland.

Key biodiversity
Over 200 species have been recorded, 140 of them breeding. Species of global conservation concern that do not meet IBA criteria: Aythya nyroca (up to two birds on passage), Haliaeetus albicilla (up to five non-breeding birds), Crex crex (4-9 breeding pairs).

Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Marshy valley of the Drweca river. Downloaded from on 21/09/2023.