|Central coordinates||21o 35.00' East 54o 18.00' North|
|Altitude||64 - 80m|
|Year of IBA assessment||2010|
Site description The site encompasses the nutrient-rich lake and adjoining wet forest and open areas with many swamps. Most of the previously pastured areas are no longer used, and have reverted to swamps occupied by young alder Alnus wood or sedge meadows. Open water is not extensive, and the greater part of the lake is covered by reedbeds Phragmites. There are seven islands (all forested). The Owinka river (tributary of the £yna) rises from the lake.
Key Biodiversity Breeding species of global conservation concern that do not meet IBA criteria: Haliaeetus albicilla (one pair), Crex crex (four pairs). A total of 126 species have been recorded.
|Species||Season||Period||Population estimate||Quality of estimate||IBA Criteria||IUCN Category|
|Little Crake Zapornia parva||breeding||2007-2009||70-90 males only||medium||C6||Least Concern|
|Black Tern Chlidonias niger||breeding||2007-2009||40-45 breeding pairs||good||C6||Least Concern|
|Protected area||Designation||Area (ha)||Relationship with IBA||Overlap with IBA (ha)|
|Jezioro Siedmiu Wysp||Nature Reserve||999||protected area contained by site||1,000|
|Jezioro Siedmiu Wysp||Wetlands of International Importance (Ramsar)||999||protected area contained by site||1,007|
|IUCN habitat||Habitat detail||Extent (% of site)|
|Forest||Broadleaved deciduous woodland; Mixed woodland; Native coniferous woodland||15%|
|Grassland||Humid grasslands; Mesophile grasslands||15%|
|Wetlands (inland)||Fens, transition mires and springs; Raised bogs; Rivers and streams; Standing freshwater; Water fringe vegetation||40%|
|Artificial - terrestrial||Arable land; Ruderal land||30%|
|Land-use||Extent (% of site)|
|nature conservation and research||40%|
Protection status National Partial International Partial1,007 ha of IBA covered by Nature Reserve (Jezioro Siedmiu Wysp [Bird Reserve], 1,007 ha). 1,007 ha of IBA covered by Ramsar Site (Jezioro Siedmiu Wysp, 1,007 ha).
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Recommended citation BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Oswin site. Downloaded from http://www.birdlife.org on 26/07/2016
To provide new information to update this factsheet or to correct any errors, please email BirdLife