Gródek-Michalowo basin

Country/territory: Poland

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

Area: 5,168 ha

Protection status:

Ogólnopolskie Towarzystwo Ochrony Ptaków
Most recent IBA monitoring assessment
Year of assessment Threat score (pressure) Condition score (state) Action score (response)
2011 not assessed near favourable not assessed
For more information about IBA monitoring please click here

Site description
The site consists of a large basin covered by a thick layer of peat. The basin drains into the upper course of the Supraœl river, which traverses the northern part of the site. Most of the area has been drained by man, but in many places there are still mires. The central part of the basin is occupied by fens (mainly sedge-beds, occasionally reedbeds Phragmites), while the southern part is raised bog, with marshy forest and a variety of bog mosses. There are two small lakes, Gorbacz and Wiejki. The marshy forest is dominated by birch Betula and pine Pinus, with alder Alnus scrub also common.

Key biodiversity
A total of 105 species have been recorded breeding. Species of global conservation concern that do not meet IBA criteria: Haliaeetus albicilla (one bird on passage), Crex crex (20-40 breeding birds).

Recommended citation
BirdLife International (2021) Important Bird Areas factsheet: Gródek-Michalowo basin. Downloaded from on 07/03/2021.