Oswin site

IBA Criteria

Year of most recent IBA criteria assessment: 2010

Populations of IBA trigger species
Species Current IUCN Red List Category Season Year(s) of estimate Population estimate IBA Criteria Triggered
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

Note: This table presents the IBA criteria triggered and the species that triggered then at the time of assessment, the current IUCN Red List category may vary from that which was in place at that time.

For more information about the IBA assessment process and criteria please click here

IBA Monitoring

Most recent IBA monitoring assessment
Year of assessment Threat score (pressure) Condition score (state) Action score (response)
2011 not assessed favourable not assessed
Was the whole site covered? Yes State assessed by Population
Accuracy of information good

IBA Protection

Protected Area Designation Area (ha) Relationship with IBA Overlap 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


IUCN Habitat 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 further information about the habitat classification please click here.

Land use

Land-use Extent (% of site)
agriculture -
forestry -
nature conservation and research -
not utilised -
hunting -
For further information about the land use classification please click here.

Recommended citation
BirdLife International (2022) Important Bird Areas factsheet: Oswin site. Downloaded from on 16/08/2022.