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close| Location | Finland, Etelä-Suomen lääni |
| Central coordinates | 24o 15.00' East 60o 58.00' North |
| IBA criteria | B3, C6 |
| Area | 200 ha |
| Altitude | 100 m |
| Year of IBA assessment | 2000 |
Ornithological information One of the best breeding areas for Porzana porzana in Finland. Species of global conservation concern that do not meet IBA criteria: Crex crex (1-5 pairs, breeding).
Site description A small eutrophic lake surrounded by young deciduous forests in the heart of Häme province. The area of open water is small, with extensive marshes of Equisetum, Carex and grasses, which were harvested by local people until the 1950s, and now are encroaching on the lake. The major human activity is large-scale hunting in autumn.
Populations of IBA trigger species
| Species | Season | Period | Population estimate | Quality of estimate | IBA Criteria | IUCN Category |
|---|---|---|---|---|---|---|
| Spotted Crake Porzana porzana | breeding | 1996 | 11-50 breeding pairs | medium | B3, C6 | Least Concern |
Protected areas
| Protected area | Designation | Area (ha) | Relationship with IBA | Overlap with IBA (ha) | |
|---|---|---|---|---|---|
| Koijärven luonnonsuojelualueet 1 | Private Nature Reserve | 4 | protected area contained by site | 41 |
|
| Koijärvi - FI0302001 | Birds Directive | 242 | protected area overlaps with site | 171 |
Habitats
| IUCN habitat | Habitat detail | Extent (% of site) |
|---|---|---|
| Wetlands (inland) | Standing freshwater; Water fringe vegetation | 100% |
Land use
| Land-use | Extent (% of site) |
|---|---|
| hunting | - |
Management considerations The major threat to the avifauna is nutrient pollution of the lake by run-off from adjacent agricultural areas. A birdwatching tower is situated within the area. Part of the area is a candidate SAC.
Protection status National Partial International High41 ha of IBA covered by Protected Area on Private Land (Koijärvi, 41 ha). 186 ha of IBA covered by Special Protection Area (Koijärvi).
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Recommended citation BirdLife International (2013) Important Bird Areas factsheet: Koijärvi lake. Downloaded from http://www.birdlife.org on 21/05/2013
To provide new information to update this factsheet or to correct any errors, please email BirdLife
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