A lake, c.15 km long, which was isolated from the Gulf of Bothnia by land elevation. The shallow waters have favoured the spread of Scirpus and Phragmites, which almost divide the lake in two at one point. Floating vegetation is also extensive and parts of the south-western end of the lake have been invaded by Salix scrub.
The area is important as a resting area for migrating geese, ducks, raptors and waders. 210 species of bird have been recorded.
Pressure/threats to key biodiversity
Dredging undertaken by land-owners poses a threat.
National None International High3,320 ha of IBA covered by Ramsar Site (Persöfjärden, 3,320 ha).
BirdLife International (2021) Important Bird Areas factsheet: Lake Persöfjärden. Downloaded from
http://www.birdlife.org on 22/01/2021.