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Location Poland, opolskie
Central coordinates 17o 15.00' East  50o 27.00' North
IBA criteria C3, C4, C6
Area 2,072 ha
Altitude 200 m
Year of IBA assessment 2010

Ogólnopolskie Towarzystwo Ochrony Ptaków



Site description A large storage reservoir on the Nysa K³odzka river, in a hilly agricultural landscape, near Otmuchów reservoir. At the western end there are artificial islands created as a result of gravel exploitation. Southern and western shores are partly overgrown with willow Salix scrub with sparse water-fringe vegetation. Two river mouths (the Widna and the Bia³a G³uchowska) are important for birds. Land-uses include gravel exploitation.

Key Biodiversity Up to 60,000 ducks, geese, gulls and waders occur on migration and in winter.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Bean Goose Anser fabalis passage  2004-2008  29,500 individuals  good  C3  Least Concern 
Mallard Anas platyrhynchos passage  1995-2003  23,000 individuals  C3  Least Concern 
Mediterranean Gull Larus melanocephalus breeding  2004-2009  3-9 breeding pairs  good  C6  Least Concern 
Common Tern Sterna hirundo breeding  2008  186 breeding pairs  good  C6  Least Concern 
A4iii Species group - waterbirds passage  2004-2008  30,000 individuals  good  C4   

IBA Monitoring

2008 very high favourable low
Population
Medium - based upon reliable but incomplete / partially representative data

Human intrusions and disturbance recreational activities happening now some of area/population (10-49%) slow but significant deterioration medium
Invasive and other problematic species and genes invasive non-native/alien species/diseases - unspecified species happening now whole area/population (>90%) moderate to rapid deterioration very high
Natural system modifications dams & water management/use - dams (size unknown) happening now whole area/population (>90%) very rapid to severe deterioration very high
Natural system modifications fire & fire suppression - increase in fire frequency/intensity happening now majority/most of area/population (50-90%) no or imperceptible deterioration low
Over-exploitation, persecution and control of species hunting & collecting terrestrial animals - intentional use (species being assessed is the target) happening now some of area/population (10-49%) slow but significant deterioration medium
Pollution domestic & urban waste water - type unknown/unrecorded happening now some of area/population (10-49%) no or imperceptible deterioration low
Pollution excess energy - noise pollution happening now some of area/population (10-49%) no or imperceptible deterioration low
Residential and commercial development tourism and recreation areas happening now some of area/population (10-49%) no or imperceptible deterioration low

Larus ridibundus Black-headed Gull 4410 4410 breeding pairs 100 favourable
Larus melanocephalus Mediterranean Gull 9 9 breeding pairs 100 favourable
Sterna hirundo Common Tern 186 186 breeding pairs 100 favourable

Most of site (50-90%) covered (including the most critical parts for important bird species)  No management planning has taken place  Some limited conservation initiatives are in place  low 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Zbiornik Nyski - PLB160002 Birds Directive 2,128 protected area overlaps with site 1,814  

Habitats

IUCN habitat Habitat detail Extent (% of site)
Wetlands (inland) Standing freshwater; Water fringe vegetation  100%

Land use

Land-use Extent (% of site)
tourism/recreation 10%
water management 90%

Protection status National None International None

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Nysa reservoir. Downloaded from http://www.birdlife.org on 26/12/2014

To provide new information to update this factsheet or to correct any errors, please email BirdLife