A very shallow (up to 3 m deep) nutrient-rich lake, with adjoining sedge-beds, transitional mires, alder Alnus woodland and willow Salix scrub. The lake shores are covered by beds of bulrush Scirpus, reed Phragmites and reed-mace Typha. Three-quarters of the lake bottom is covered by stonewort Chara and pondweed Potamogeton. The lake and a surrounding 100-m-wide belt are protected, but the area beyond is cultivated.
Large concentrations of waterbirds occur, regularly exceeding 20,000 individuals, mainly swans, ducks, Fulica atra, and gulls Larus. Species of global conservation concern that do not meet IBA criteria: Haliaeetus albicilla (1-2 non-breeding birds feed in the IBA, nesting nearby), Crex crex (4-6 pairs).
Pressure/threats to key biodiversity
Water overflow from niardwy lake threatens the shallow end of this lake with nutrient pollution, following agricultural run-off in the surrounding area.
National High International High710 ha of IBA covered by Nature Reserve (Jezioro £uknajno, 710 ha). 710 ha of IBA covered by Ramsar Site (Jezioro £uknajno, 710 ha).
BirdLife International (2023) Important Bird Areas factsheet: Luknajno lake. Downloaded from
http://www.birdlife.org on 31/03/2023.