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'):Species | Current IUCN Red List Category | Season | Year(s) | Population estimate at site | IBA criteria met |
---|---|---|---|---|---|
Corncrake Crex crex | LC | breeding | 1999 | 300-350 males | C1, C6 |
Black-tailed Godwit Limosa limosa | NT | passage | 2004-2009 | 30 individuals | C1 |
Black Tern Chlidonias niger | LC | breeding | 2004-2009 | 50-80 breeding pairs | C6 |
Montagu's Harrier Circus pygargus | LC | breeding | 1995-2003 | 30 breeding pairs | C6 |
Common Kingfisher Alcedo atthis | LC | breeding | 1995-2003 | 110-140 breeding pairs | C6 |
Syrian Woodpecker Dendrocopos syriacus | LC | breeding | 1996-2009 | 40-100 breeding pairs | C6 |
Aquatic Warbler Acrocephalus paludicola | VU | breeding | 2009 | 48 males | C1, C6 |
The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2010).
IBA conservation assessment | |||
---|---|---|---|
Year of assessment (most recent) | State (condition) | Pressure (threat) | Response (action) |
2010 | near favourable | very high | not assessed |
Was the whole site assessed? | State assessed by | Accuracy of information | |
yes | population | medium |
State (condition of the trigger species' populations) | ||||||
---|---|---|---|---|---|---|
Scientific name | Common name | Reference population | Actual population | Units | % of population remaining | Result |
Chlidonias niger | Black Tern | 80 | 57 | breeding pairs | 72 | near favourable |
State (condition of the trigger species' habitats) | ||||||
---|---|---|---|---|---|---|
Habitat | Habitat detail | Reference area (ha) | Actual area (ha) | Habitat quantity (% remaining) | Habitat quality (carrying capacity) | Result |
Grassland | 0 | 0 | moderate (70-90%) | moderate (70-90%) | unfavourable |
Pressure (threats to the trigger species and/or their habitats) | |||||
---|---|---|---|---|---|
Threat level 1 | Threat level 2 | Timing | Scope | Severity | Result |
Agricultural expansion and intensification | annual & perennial non-timber crops - small-holder farming | happening now | some of area/population (10-49%) | slow but significant deterioration | medium |
Agricultural expansion and intensification | marine and freshwater aquaculture - subsistence/artisinal aquaculture | happening now | whole area/population (>90%) | very rapid to severe deterioration | very high |
Agricultural expansion and intensification | wood and pulp plantations (includes afforestation) - small-holder plantations | happening now | small area/few individuals (<10%) | slow but significant deterioration | low |
Biological resource use | hunting & collecting terrestrial animals - intentional use (species being assessed is the target) | happening now | majority/most of area/population (50-90%) | moderate to rapid deterioration | high |
Climate change and severe weather | storms and floods | happening now | majority/most of area/population (50-90%) | no or imperceptible deterioration | low |
Energy production and mining | renewable energy | happening now | whole area/population (>90%) | moderate to rapid deterioration | very high |
Human intrusions and disturbance | recreational activities | likely in short term (within 4 years) | majority/most of area/population (50-90%) | no or imperceptible deterioration | low |
Natural system modifications | dams & water management/use - dams (size unknown) | likely in short term (within 4 years) | majority/most of area/population (50-90%) | moderate to rapid deterioration | high |
Natural system modifications | other ecosystem modifications | happening now | majority/most of area/population (50-90%) | slow but significant deterioration | high |
No known threats | no known threats | happening now | small area/few individuals (<10%) | no or imperceptible deterioration | low |
Residential and commercial development | tourism and recreation areas | happening now | some of area/population (10-49%) | slow but significant deterioration | medium |
Transportation and service corridors | utility & service lines | happening now | whole area/population (>90%) | moderate to rapid deterioration | very high |
Response (conservation actions taken for the trigger species and/or their habitats) | |||
---|---|---|---|
Protected-area designation | Management planning | Other conservation action | Result |
Not assessed | Not assessed | Not assessed | not assessed |
Protected area (PA) | PA designation | PA area (ha) | Relationship of PA with IBA | Overlap of PA with IBA (ha) |
---|---|---|---|---|
Zachodniowołyńska Dolina Bugu | Site of Community Importance (Habitats Directive) | 1,556 | protected area overlaps with site | 1,473 |
Strzelecki Park Krajobrazowy | Park Krajobrazowy | 12,681 | protected area overlaps with site | 0 |
Sobiborski Park Krajobrazowy | Park Krajobrazowy | 11,160 | protected area is adjacent to site | 0 |
Poleski Obszar Chronionego Krajobrazu | Obszar Chronionego Krajobrazu | 48,377 | protected area overlaps with site | 0 |
Poleska Dolina Bugu | Site of Community Importance (Habitats Directive) | 8,173 | protected area overlaps with site | 8,173 |
Nadbużański Obszar Chronionego Krajobrazu | Obszar Chronionego Krajobrazu | 12,123 | protected area overlaps with site | 0 |
Nadbużański Obszar Chronionego Krajobrazu | Obszar Chronionego Krajobrazu | 15,095 | protected area overlaps with site | 0 |
Małoziemce | Rezerwat Przyrody | 38 | protected area overlaps with site | 0 |
Grabowiecko-Strzelecki Obszar Chronionego Krajobrazu | Obszar Chronionego Krajobrazu | 25,815 | protected area overlaps with site | 0 |
Dołhobyczowski Obszar Chronionego Krajobrazu | Obszar Chronionego Krajobrazu | 9,780 | protected area overlaps with site | 0 |
Dolina Środkowego Bugu | Special Protection Area (Birds Directive) | 28,097 | protected area overlaps with site | 25,361 |
Habitat (IUCN level 1) | Habitat detail | Extent (% of site) |
---|---|---|
Forest | Broadleaved deciduous woodland, Native coniferous woodland, Mixed woodland, Alluvial and very wet forest | - |
Other | - | |
Grassland | Steppes and dry calcareous grassland, Humid grasslands, Mesophile grasslands | - |
Wetlands (inland) | Standing freshwater, Rivers and streams, Water fringe vegetation, Fens, transition mires and springs | - |
Artificial/Terrestrial | Highly improved re-seeded landscapes, Arable land, Other urban and industrial areas, Ruderal land | - |
Land-use | Extent (% of site) |
---|---|
agriculture | - |
forestry | - |
urban/industrial/transport | - |
not utilised | - |
nature conservation and research | - |
hunting | - |
Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Middle Bug river valley. Downloaded from
http://datazone.birdlife.org/site/factsheet/middle-bug-river-valley-iba-poland on 23/09/2023.