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PL104
Middle Bug river valley


IBA Justification

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

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
For more information about IBA conservation status, please click here

IBA Protection

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 15,095 protected area overlaps with site 0
Nadbużański Obszar Chronionego Krajobrazu Obszar Chronionego Krajobrazu 12,123 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

Habitats

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 -
For more information about the IUCN Habitat classification, please click here.

Land use

Land-use Extent (% of site)
agriculture -
forestry -
urban/industrial/transport -
not utilised -
nature conservation and research -
hunting -


Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Middle Bug river valley. Downloaded from https://datazone.birdlife.org/site/factsheet/middle-bug-river-valley-iba-poland on 04/03/2024.