Data Zone
The site was identified as internationally important for bird conservation in 2010 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 |
|---|---|---|---|---|
| Corncrake Crex crex | LC | breeding (2008) | 352–365 males | C1, C6 |
| Eurasian Curlew Numenius arquata | NT | breeding (2008) | 16–17 pairs | C1 |
| Great Snipe Gallinago media | NT | breeding (2008) | 14 males | C6 |
| Montagu's Harrier Circus pygargus | LC | breeding (2008) | 13–14 pairs | C6 |
| Aquatic Warbler Acrocephalus paludicola | VU | breeding (2008) | 73–74 males | C1, C6 |
| Barred Warbler Curruca nisoria | LC | breeding (2008) | 263–300 pairs | C6 |
Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2010. The most recent assessment (2010) is shown below.
| IBA conservation assessment | |||
|---|---|---|---|
| Year of assessment | State | Pressure | Response |
| 2010 | not assessed | very high | very low |
| Whole site assessed? | State assessed by | Accuracy of information | |
| yes | population | medium | |
| State (condition of the trigger species' populations) | |||||
|---|---|---|---|---|---|
| Species | Actual vs Reference (units) | % remaining | Result | ||
| Barred Warbler Curruca nisoria | 2 / 2 (pairs) | 100 | not assessed | ||
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Natural system modifications | happening now | most of population/area (50–90%) | rapid decline (>30% over 3 generations) | very high |
| Pollution | happening now | most of population/area (50–90%) | rapid decline (>30% over 3 generations) | very high |
| Climate change and severe weather | happening now | whole of population/area (>90%) | slow decline (1–10% over 3 generations) | high |
| Invasive and other problematic species and genes | 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 |
| Biological resource use | happening now | some of population/area (10–49%) | slow decline (1–10% over 3 generations) | medium |
| Agricultural expansion and intensification | happening now | some of population/area (10–49%) | slow decline (1–10% over 3 generations) | medium |
| No known threats | happening now | few individuals/small area (<10%) | no or slight decline (<1% over 3 generations) | low |
| Response (conservation actions taken for the trigger species and/or their habitats) | |||
|---|---|---|---|
| Designation | Planning | Action | Result |
| Some of area covered (10–49%) | Not assessed | Very little or no conservation action taking place | very low |
| Year | Protected Area | Designation (management category) | % coverage of IBA |
|---|---|---|---|
| 1968 | Bagno Wizna II | Rezerwat Przyrody (IV) | 1 |
| 1968 | Bagno Wizna I | Rezerwat Przyrody (IV) | <1 |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Grassland | 90 | |
| Wetlands (inland) | 8 | |
| Artificial/Terrestrial | 1 | |
| Forest | 1 |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Wizna Swamps (Poland). Downloaded from
https://datazone.birdlife.org/site/factsheet/wizna-swamps-iba-poland on 23/12/2024.