A shallow nutrient-rich lake with six islands, surrounded by wet meadows, mires, reedbeds and woodland.
The lake (and particularly the islands) are important for breeding waterbirds, notably Sterna albifrons and Chlidonias niger. Breeding species of global conservation concern that do not meet IBA criteria: Aythya nyroca (possibly an irregular breeder), Crex crex (up to 3 calling males), Gallinago media (1 known pair).
BirdLife International (2019) Important Bird Areas factsheet: Kretuonas Landscape Reserve. Downloaded from http://www.birdlife.org on 10/12/2019.