Sites - Important Bird and Biodiversity Areas (IBAs)
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Köyliönjärvi and Pyhäjärvi lakes
Finland, Länsi-Suomen lääni
22o 11.00' East 61o 5.00' North
A1, A4i, B1i, C1, C2, C3
Year of IBA assessment
Site description Two adjacent large lakes lying south-east of Eura. Köyliönjärvi lake is 10 km long, eutrophic and surrounded by farmland and settlements. Several large ridge-like islands with mixed habitats stand in the middle of the lake. Cattle graze some parts of the shoreline keeping meadow vegetation low and deciduous forests open. The IBA also includes some of the most ornithologically important bays of Pyhäjärvi lake, which is otherwise nutrient-poor, (oligotrophic) and unimportant for birds.
Key Biodiversity One of the most important staging areas for Mergus merganser (in autumn) in Finland. Species of global conservation concern that do not meet IBA criteria: Haliaeetus albicilla (5 individuals, passage), Crex crex (1 pair, breeding).