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 |
|---|---|---|---|---|
| Whooper Swan Cygnus cygnus | LC | breeding (2004–2009) | 1–2 pairs | C6 |
| Spotted Crake Porzana porzana | LC | breeding (2001–2008) | 5–30 males | C6 |
| Little Crake Zapornia parva | LC | breeding (2009) | 30–50 males | C6 |
| Common Crane Grus grus | LC | passage (2002–2003) | 1,000–1,500 birds | C2 |
| Black-tailed Godwit Limosa limosa | NT | breeding (2004–2008) | 12–25 pairs | C1 |
| Black-tailed Godwit Limosa limosa | NT | passage (2004–2008) | 30–130 birds | C1 |
| Little Tern Sternula albifrons | LC | breeding (2001–2009) | 8–25 pairs | C6 |
| Whiskered Tern Chlidonias hybrida | LC | breeding (2004–2008) | 90–180 pairs | C6 |
| Black Tern Chlidonias niger | LC | breeding (2004–2008) | 10–90 males | C6 |
| Common Tern Sterna hirundo | LC | breeding (2004–2009) | 60–300 pairs | C6 |
| Aquatic Warbler Acrocephalus paludicola | VU | breeding (2004–2009) | 10 males | C1 |
| A4iii Species group - waterbirds | n/a | passage (2004–2009) | 10,000–50,000 birds | C4 |
Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2010. The most recent assessment (2011) is shown below.
| IBA conservation assessment | |||
|---|---|---|---|
| Year of assessment | State | Pressure | Response |
| 2011 | very poor | not assessed | not assessed |
| 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 | ||
| Whooper Swan Cygnus cygnus | 1 / 1 (males) | 100 | good | ||
| Common Crane Grus grus | 1,000 / 1,500 (birds) | 67 | poor | ||
| Black-tailed Godwit Limosa limosa | 3 / 25 (pairs) | 12 | very poor | ||
| Black-headed Gull Larus ridibundus | 315 / 1,500 (pairs) | 21 | very poor | ||
| Common Tern Sterna hirundo | 110 / 300 (pairs) | 37 | very poor | ||
| Response (conservation actions taken for the trigger species and/or their habitats) | |||
|---|---|---|---|
| Designation | Planning | Action | Result |
| Not assessed | Not assessed | Not assessed | not assessed |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Siemianowka Reseirvoir (Poland). Downloaded from
https://datazone.birdlife.org/site/factsheet/siemianowka-reseirvoir-iba-poland on 22/12/2024.