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close| Location | Finland, Länsi-Suomen lääni |
| Central coordinates | 22o 11.00' East 61o 5.00' North |
| IBA criteria | A1, A4i, B1i, C1, C2, C3 |
| Area | 2,759 ha |
| Altitude | 41 m |
| Year of IBA assessment | 2000 |
Ornithological information 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).
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.
Populations of IBA trigger species
| Species | Season | Period | Population estimate | Quality of estimate | IBA Criteria | IUCN Category |
|---|---|---|---|---|---|---|
| Whooper Swan Cygnus cygnus | passage | 1997 | 400 individuals | medium | B1i, C2 | Least Concern |
| Common Merganser Mergus merganser | passage | 1997 | 3,000 individuals | medium | A4i, B1i, C3 | Least Concern |
| Red-necked Grebe Podiceps grisegena | breeding | 1997 | 101 breeding pairs | medium | B1i, C3 | Least Concern |
| White-tailed Eagle Haliaeetus albicilla | winter | 1997 | 10-15 individuals | - | A1, C1 | Least Concern |
Protected areas
| Protected area | Designation | Area (ha) | Relationship with IBA | Overlap with IBA (ha) | |
|---|---|---|---|---|---|
| Harolanlahti - FI0200026 | Birds Directive | 343 | protected area overlaps with site | 323 | |
| Köyliönjärvi - FI0200032 | Birds Directive | 303 | protected area overlaps with site | 279 | |
| Pyhäjärvi - FI0200161 | Birds Directive | 15,297 | protected area overlaps with site | 661 |
Habitats
| IUCN habitat | Habitat detail | Extent (% of site) |
|---|---|---|
| Forest | Broadleaved deciduous woodland; Mixed woodland | - |
| Wetlands (inland) | Standing freshwater | 80% |
| Rocky areas | - | |
| Artificial landscapes (terrestrial) | - |
Land use
| Land-use | Extent (% of site) |
|---|---|
| agriculture | 90% |
| forestry | 10% |
| military | 5% |
| water management | 80% |
| fisheries/aquaculture | - |
Management considerations Part of the area is a candidate SAC.
Protection status National None International Partial689 ha of IBA covered by Special Protection Area (Köyliönjärvi).
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Recommended citation BirdLife International (2013) Important Bird Areas factsheet: Köyliönjärvi and Pyhäjärvi lakes. Downloaded from http://www.birdlife.org on 20/05/2013
To provide new information to update this factsheet or to correct any errors, please email BirdLife
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