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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
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   

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Siemianowka Reseirvoir. Downloaded from on 29/08/2014

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