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 IBA criteria.
Populations meeting IBA criteria ('key species') at the site:| Species | Red List | Season (year/s of estimate) | Size | IBA criteria |
|---|---|---|---|---|
| Corncrake Crex crex | LC | breeding (2001–2008) | 56–64 males | C1 |
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 status | |||
|---|---|---|---|
| Year of assessment | State | Pressure | Response |
| 2010 | very unfavourable | high | low |
| Whole site assessed? | State assessed by | Accuracy of information | |
| yes | habitat | medium | |
| State (condition of the key species' habitats) | |||
|---|---|---|---|
| Habitat | Quantity (% remaining) | Quality (% carrying capacity) | Result |
| Grassland | poor (40–69%) | poor (40–69%) | very unfavourable |
| Forest | moderate (70–90%) | moderate (70–90%) | unfavourable |
| Pressure (threats to the key species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Climate change and severe weather | happening now | most of population/area (50–90%) | moderate deterioration (10–30% in 3 generations) | high |
| Natural system modifications | happening now | most of population/area (50–90%) | slow deterioration (1–10% over 3 generations) | high |
| Agricultural expansion and intensification | happening now | some of population/area (10–49%) | moderate deterioration (10–30% in 3 generations) | high |
| Transportation and service corridors | happening now | some of population/area (10–49%) | no deterioration (<1% over 3 generations) | low |
| Residential and commercial development | happening now | few individuals/small area (<10%) | slow deterioration (1–10% over 3 generations) | low |
| Pollution | happening now | few individuals/small area (<10%) | no deterioration (<1% over 3 generations) | low |
| Human intrusions and disturbance | happening now | few individuals/small area (<10%) | no deterioration (<1% over 3 generations) | low |
| Response (conservation actions taken for the key species and/or their habitats) | |||
|---|---|---|---|
| Designation | Planning | Action | Result |
| Most of site (50–90%) covered (including the most critical parts for important bird species) | A management plan exists, but it is out of date or not comprehensive | Very little or no conservation action taking place | low |
| Year | Protected Area | Designation (management category) | % coverage of IBA |
|---|---|---|---|
| 1977 | Na Torfach im. Janusza Kozłowskiego | Rezerwat Przyrody (IV) | <1 |
| 1987 | Mazowiecki Park Krajobrazowy | Park Krajobrazowy (V) | 60 |
| 1996 | Wymięklizna | Rezerwat Przyrody (IV) | 1 |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Grassland | 52 | |
| Forest | 41 | |
| Artificial/Terrestrial | 5 | |
| Wetlands (inland) | 2 |
Recommended citation
BirdLife International (2025) Important Bird Area factsheet: Calowanie Swamp (Poland). Downloaded from
https://datazone.birdlife.org/site/factsheet/calowanie-swamp-iba-poland on 05/01/2025.