Data Zone
The site was identified as important 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 List1 | Season | Year(s) | Size | IBA criteria |
|---|---|---|---|---|---|
| Corncrake Crex crex | LC | breeding | 2008 | 352-365 males | C1, C6 |
| Eurasian Curlew Numenius arquata | NT | breeding | 2008 | 16-17 breeding pairs | C1 |
| Great Snipe Gallinago media | NT | breeding | 2008 | 14 males | C6 |
| Montagu's Harrier Circus pygargus | LC | breeding | 2008 | 13-14 breeding pairs | C6 |
| Aquatic Warbler Acrocephalus paludicola | VU | breeding | 2008 | 73-74 males | C1, C6 |
| Barred Warbler Curruca nisoria | LC | breeding | 2008 | 263-300 breeding pairs | C6 |
1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2010) may differ.
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 | negligible |
| Whole site assessed? | State assessed by | Accuracy of information | |
| yes | population | medium | |
| State (condition of the trigger species' populations) | |||||
|---|---|---|---|---|---|
| Species | Reference | Actual | Units | % remaining | Result |
| Barred Warbler Curruca nisoria | 2 | 2 | breeding pairs | 100 | not assessed |
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Natural system modifications | happening now | majority/most of area/population (50-90%) | very rapid to severe deterioration | very high |
| Pollution | happening now | majority/most of area/population (50-90%) | very rapid to severe deterioration | very high |
| Agricultural expansion and intensification | happening now | majority/most of area/population (50-90%) | very rapid to severe deterioration | very high |
| Invasive and other problematic species and genes | happening now | majority/most of area/population (50-90%) | slow but significant deterioration | high |
| Climate change and severe weather | happening now | whole area/population (>90%) | slow but significant deterioration | high |
| Human intrusions and disturbance | happening now | some of area/population (10-49%) | slow but significant deterioration | medium |
| Biological resource use | happening now | some of area/population (10-49%) | slow but significant deterioration | medium |
| No known threats | happening now | small area/few individuals (<10%) | no or imperceptible deterioration | low |
| Response (conservation actions taken for the trigger species and/or their habitats) | |||
|---|---|---|---|
| Protected areas | Management plan | Other action | Result |
| Some of site covered (10-49%) | Not assessed | Very little or no conservation action taking place | negligible |
| Year | Protected Area | Designation | % overlap with IBA |
|---|---|---|---|
| 1968 | Bagno Wizna II | Rezerwat Przyrody | 1 |
| 1968 | Bagno Wizna I | Rezerwat Przyrody | <1 |
| 2001 | Dolina Biebrzy | Site of Community Importance (Habitats Directive) | 20 |
| 2004 | Bagno Wizna | Special Protection Area (Birds Directive) | 87 |
| Habitat1 | Habitat detail | % of IBA |
|---|---|---|
| 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 23/11/2024.