Data Zone
The site was identified as internationally important for bird conservation in 2000 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.
Populations meeting IBA criteria ('trigger species') at the site:| Species | Red List | Season (year/s of estimate) | Size | IBA criteria |
|---|---|---|---|---|
| Whooper Swan Cygnus cygnus | LC | passage (1997) | 400 birds | B1i, C2 |
| Goosander Mergus merganser | LC | passage (1997) | 3,000 birds | A4i, B1i, C3 |
| Red-necked Grebe Podiceps grisegena | LC | breeding (1997) | 101 pairs | B1i, C3 |
| White-tailed Sea-eagle Haliaeetus albicilla | LC | winter (1997) | 10–15 birds | A1, C1 |
Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2000. The most recent assessment (2010) is shown below.
| IBA conservation assessment | |||
|---|---|---|---|
| Year of assessment | State | Pressure | Response |
| 2010 | poor | high | low |
| Whole site assessed? | State assessed by | Accuracy of information | |
| yes | population | good | |
| State (condition of the trigger species' populations) | |||||
|---|---|---|---|---|---|
| Species | Actual vs Reference (units) | % remaining | Result | ||
| Red-necked Grebe Podiceps grisegena | 65 / 100 (pairs) | 65 | poor | ||
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Residential and commercial development | happening now | most of population/area (50–90%) | slow decline (1–10% over 3 generations) | high |
| Pollution | happening now | most of population/area (50–90%) | slow decline (1–10% over 3 generations) | high |
| Human intrusions and disturbance | happening now | some of population/area (10–49%) | slow decline (1–10% over 3 generations) | medium |
| Response (conservation actions taken for the trigger species and/or their habitats) | |||
|---|---|---|---|
| Designation | Planning | Action | Result |
| Some of area covered (10–49%) | No management planning has taken place | Substantive conservation measures are being implemented, but these are not comprehensive and are limited by resources and capacity | low |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Wetlands (inland) | 80 | Standing freshwater |
| Artificial/Terrestrial | - | |
| Forest | - | Broadleaved deciduous woodland; Mixed woodland |
| Rocky areas (eg. inland cliffs, mountain peaks) | - |
| Land use | % of IBA |
|---|---|
| agriculture | 90 |
| water management | 80 |
| forestry | 10 |
| military | 5 |
| fisheries/aquaculture | - |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Köyliönjärvi and Pyhäjärvi lakes (Finland). Downloaded from
https://datazone.birdlife.org/site/factsheet/köyliönjärvi-and-pyhäjärvi-lakes-iba-finland on 23/12/2024.