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Location Poland, podlaskie
Central coordinates 23o 50.37' East  52o 56.40' North
IBA criteria C1, C2, C4, C6
Area 9,848 ha
Altitude
Year of IBA assessment 2010

Ogólnopolskie Towarzystwo Ochrony Ptaków



Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Whooper Swan Cygnus cygnus breeding  2004-2009  1-2 breeding pairs  good  C6  Least Concern 
Little Crake Zapornia parva breeding  2009  30-50 males only  medium  C6  Least Concern 
Spotted Crake Porzana porzana breeding  2001-2008  5-30 males only  medium  C6  Least Concern 
Common Crane Grus grus passage  2002-2003  1,000-1,500 individuals  good  C2  Least Concern 
Black-tailed Godwit Limosa limosa breeding  2004-2008  12-25 breeding pairs  good  C1  Near Threatened 
Black-tailed Godwit Limosa limosa passage  2004-2008  30-130 individuals  good  C1  Near Threatened 
Common Tern Sterna hirundo breeding  2004-2009  60-300 breeding pairs  good  C6  Least Concern 
Little Tern Sternula albifrons breeding  2001-2009  8-25 breeding pairs  good  C6  Least Concern 
Whiskered Tern Chlidonias hybrida breeding  2004-2008  90-180 breeding pairs  good  C6  Least Concern 
Black Tern Chlidonias niger breeding  2004-2008  10-90 males only  good  C6  Least Concern 
Aquatic Warbler Acrocephalus paludicola breeding  2004-2009  10 males only  good  C1  Vulnerable 
A4iii Species group - waterbirds passage  2004-2009  10,000-50,000 individuals  good  C4   

IBA Monitoring

2009 very high favourable low
Population
Medium - based upon reliable but incomplete / partially representative data

Energy production and mining mining and quarrying happening now some of area/population (10-49%) slow but significant deterioration medium
Human intrusions and disturbance recreational activities happening now majority/most of area/population (50-90%) moderate to rapid deterioration high
Invasive and other problematic species and genes invasive non-native/alien species/diseases - unspecified species happening now majority/most of area/population (50-90%) very rapid to severe deterioration very high
Invasive and other problematic species and genes problematic native species/diseases - unspecified species happening now majority/most of area/population (50-90%) very rapid to severe deterioration very high
Natural system modifications dams & water management/use - dams (size unknown) happening now some of area/population (10-49%) slow but significant deterioration medium
Natural system modifications other ecosystem modifications likely in short term (within 4 years) some of area/population (10-49%) slow but significant deterioration medium
No known threats no known threats happening now small area/few individuals (<10%) no or imperceptible deterioration low
Over-exploitation, persecution and control of species fishing & harvesting aquatic resources - unintentional effects: large scale happening now some of area/population (10-49%) slow but significant deterioration medium
Over-exploitation, persecution and control of species 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
Pollution domestic & urban waste water - type unknown/unrecorded happening now majority/most of area/population (50-90%) moderate to rapid deterioration high
Pollution excess energy - noise pollution happening now majority/most of area/population (50-90%) moderate to rapid deterioration high
Pollution industrial & military effluents - type unknown/unrecorded happening now majority/most of area/population (50-90%) slow but significant deterioration high
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 roads and railroads happening now majority/most of area/population (50-90%) moderate to rapid deterioration high
Transportation and service corridors shipping lanes happening now majority/most of area/population (50-90%) moderate to rapid deterioration high
Transportation and service corridors utility & service lines happening now some of area/population (10-49%) slow but significant deterioration medium

Cygnus cygnus Whooper Swan 1 1 breeding pairs 100 not assessed
Mareca strepera Gadwall 100 100 breeding pairs 100 not assessed
Zapornia parva Little Crake 50 50 males only 100 not assessed
Larus ridibundus Black-headed Gull 1500 1500 breeding pairs 100 favourable
Sterna hirundo Common Tern 300 300 breeding pairs 100 favourable
Sternula albifrons Little Tern 15 15 breeding pairs 100 favourable
Acrocephalus paludicola Aquatic Warbler 10 10 males only 100 not assessed

Most of site (50-90%) covered (including the most critical parts for important bird species)  No management planning has taken place  Very little or no conservation action taking place  low 

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Siemianowka Reseirvoir. Downloaded from http://www.birdlife.org on 22/12/2014

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