• Summary
• Text account
• Data table and detailed info
• Map
• Reference and further resources

The site was identified as important in 2010 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species'):

Species	Current IUCN Red List Category	Season	Year(s)	Population estimate at site	IBA criteria met
Little Crake Zapornia parva	LC	breeding	2007-2009	70-90 males	C6
Black Tern Chlidonias niger	LC	breeding	2007-2009	40-45 breeding pairs	C6

The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2010).

State (condition of the trigger species' populations)
Scientific name	Common name	Reference population	Actual population	Units	% of population remaining	Result
Porzana porzana	Spotted Crake	70	100	males	100	favourable
Chlidonias niger	Black Tern	45	70	breeding pairs	100	favourable

Response (conservation actions taken for the trigger species and/or their habitats)
Protected-area designation	Management planning	Other conservation action	Result
Not assessed	Not assessed	Not assessed	not assessed

For more information about IBA conservation status, please click here

Protected area (PA)	PA designation	PA area (ha)	Relationship of PA with IBA	Overlap of PA with IBA (ha)
Ostoja Warmińska	Special Protection Area (Birds Directive)	145,342	protected area is adjacent to site	0
Ostoja nad Oświnem	Site of Community Importance (Habitats Directive)	3,357	protected area overlaps with site	1,659
Lake of Seven Islands Nature Reserve (Rezerwat pyzyrody “Jezioro Siedmiu Wysp”)	Ramsar Site, Wetland of International Importance	1,618	protected area overlaps with site	1,007
Jezioro Siedmiu Wysp	Rezerwat Przyrody	1,763	protected area overlaps with site	1,000
Jezioro Oświn i okolice	Special Protection Area (Birds Directive)	2,516	protected area contains site	2,308
Jeziora Oświn	Obszar Chronionego Krajobrazu	15,262	protected area overlaps with site	0

Habitat (IUCN level 1)	Habitat detail	Extent (% of site)
Forest	Broadleaved deciduous woodland, Native coniferous woodland, Mixed woodland	-
Grassland	Humid grasslands, Mesophile grasslands	-
Wetlands (inland)	Standing freshwater, Rivers and streams, Raised bogs, Water fringe vegetation, Fens, transition mires and springs	-
Artificial/Terrestrial	Arable land, Ruderal land	-

For more information about the IUCN Habitat classification, please click here.

Land-use	Extent (% of site)
agriculture	-
forestry	-
nature conservation and research	-
not utilised	-
hunting	-

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Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Oswin site. Downloaded from http://datazone.birdlife.org/site/factsheet/oswin-site-iba-poland on 22/09/2023.