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 (1999) | 300–350 males | C1, C6 |
| Black-tailed Godwit Limosa limosa | NT | passage (2004–2009) | 30 birds | C1 |
| Black Tern Chlidonias niger | LC | breeding (2004–2009) | 50–80 pairs | C6 |
| Montagu's Harrier Circus pygargus | LC | breeding (1995–2003) | 30 pairs | C6 |
| Common Kingfisher Alcedo atthis | LC | breeding (1995–2003) | 110–140 pairs | C6 |
| Syrian Woodpecker Dendrocopos syriacus | LC | breeding (1996–2009) | 40–100 pairs | C6 |
| Aquatic Warbler Acrocephalus paludicola | VU | breeding (2009) | 48 males | C1, 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 | moderate | very high | not assessed |
| 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 | ||
| Black Tern Chlidonias niger | 57 / 80 (pairs) | 72 | moderate | ||
| State (condition of the trigger species' habitats) | |||
|---|---|---|---|
| Habitat | Quantity (% remaining) | Quality (% carrying capacity) | Result |
| Grassland | moderate (70–90%) | moderate (70–90%) | poor |
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Energy production and mining | happening now | whole of population/area (>90%) | moderate decline (10–30% over 3 generations) | very high |
| Transportation and service corridors | happening now | whole of population/area (>90%) | moderate decline (10–30% over 3 generations) | very high |
| Biological resource use | happening now | most of population/area (50–90%) | moderate decline (10–30% over 3 generations) | high |
| Natural system modifications | happening now | most of population/area (50–90%) | slow decline (1–10% over 3 generations) | high |
| Residential and commercial development | happening now | some of population/area (10–49%) | slow decline (1–10% over 3 generations) | medium |
| Climate change and severe weather | happening now | most of population/area (50–90%) | no or slight decline (<1% over 3 generations) | low |
| Agricultural expansion and intensification | happening now | few individuals/small area (<10%) | slow decline (1–10% over 3 generations) | low |
| No known threats | happening now | few individuals/small area (<10%) | no or slight decline (<1% over 3 generations) | low |
| Human intrusions and disturbance | likely in short term (<4 years) | most of population/area (50–90%) | 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 |
| Not assessed | Not assessed | Not assessed | not assessed |
| Year | Protected Area | Designation (management category) | % coverage of IBA |
|---|---|---|---|
| 1983 | Strzelecki Park Krajobrazowy | Park Krajobrazowy (V) | 5 |
| 1988 | Małoziemce | Rezerwat Przyrody (IV) | <1 |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Grassland | 51 | Steppes and dry calcareous grassland; Humid grasslands; Mesophile grasslands |
| Artificial/Terrestrial | 34 | Highly improved re-seeded landscapes; Arable land; Other urban and industrial areas; Ruderal land |
| Forest | 10 | Broadleaved deciduous woodland; Native coniferous woodland; Mixed woodland; Alluvial and very wet forest |
| Other | 3 | |
| Wetlands (inland) | 2 | Standing freshwater; Rivers and streams; Water fringe vegetation; Fens, transition mires and springs |
| Land use | % of IBA |
|---|---|
| agriculture | 75 |
| nature conservation and research | 30 |
| forestry | 5 |
| urban/industrial/transport | 5 |
| not utilised | 5 |
| hunting | - |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Middle Bug river valley (Poland). Downloaded from
https://datazone.birdlife.org/site/factsheet/middle-bug-river-valley-iba-poland on 25/12/2024.