|Central coordinates||6o 41.00' East 53o 8.00' North|
|IBA criteria||A4i, B1i, B2, C2|
|Altitude||0 - 1m|
|Year of IBA assessment||2000|
Site description A freshwater lake located south-east of the city of Groningen, with reedbeds and an extensive area of wet pasture. Human activities include reed-harvesting.
Key Biodiversity Lake Zuidlaardermeer is used as a roost by swans Cygnus and geese Anser.
|Species||Season||Period||Population estimate||Quality of estimate||IBA Criteria||IUCN Category|
|Tundra Swan Cygnus columbianus||winter||1991||282 individuals||good||A4i, B1i, B2, C2||Least Concern|
|Protected area||Designation||Area (ha)||Relationship with IBA||Overlap with IBA (ha)|
|Onnerpolder||Nature Reserve||261||protected area contained by site||261|
|Zuidlaardermeer||Nature Reserve||171||protected area contained by site||171|
|Zuidlaardermeer II||Nature Reserve||330||protected area contained by site||330|
|Zuidlaardermeergebied||Wetlands of International Importance (Ramsar)||2,100||protected area overlaps with site||2,100|
|IUCN habitat||Habitat detail||Extent (% of site)|
|Wetlands (inland)||Standing freshwater||34%|
|Artificial - terrestrial||Highly improved re-seeded landscapes||66%|
|Land-use||Extent (% of site)|
|nature conservation and research||63%|
Protection status National Partial International None261 ha of IBA covered by Nature Reserve (Onnerpolder, 261 ha). 171 ha of IBA covered by Nature Reserve (Zuidlaardermeer, 171 ha). 330 ha of IBA covered by Nature Reserve (Zuidlaardermeer II, 330 ha).
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Recommended citation BirdLife International (2015) Important Bird Areas factsheet: Lake Zuidlaardermeer and Onnerpolder. Downloaded from http://www.birdlife.org on 03/09/2015
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