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Location Sweden, Västra Götaland
Central coordinates 13o 54.00' East  58o 34.00' North
IBA criteria A4i, B1i, B3, C2, C3
Area 1,020 ha
Altitude 66 - 70m
Year of IBA assessment 2000

Sveriges Ornitologiska Förening

Site description A shallow, nutrient-rich lake situated in a generally flat landscape, except for a few higher areas that are covered by coniferous forest. The lake was lowered three times by drainage projects in the nineteenth century and the reclaimed land, now grazed water-meadows, forms an important wader habitat. The rapid water exchange in the lake means that the period of ice-cover is quite short. Livestock-grazing is the main land-use.

Key Biodiversity The site is important as a stop-over site for passage waterbirds and waders. Passage species of global conservation concern that do not meet IBA criteria: Anser erythropus, Crex crex and Gallinago media.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Bean Goose Anser fabalis passage  10,500 individuals  A4i, B1i, C3  Least Concern 
Whooper Swan Cygnus cygnus passage  1,000 individuals  A4i, B1i, C2  Least Concern 
Common Grasshopper-warbler Locustella naevia breeding  60 breeding pairs  B3  Least Concern 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Logården Nature Reserve 88 protected area overlaps with site 30  
Östen Nature Reserve 1,397 protected area overlaps with site 1,010  
Östen Wetlands of International Importance (Ramsar) 1,010 is identical to site 1,010  


IUCN habitat Habitat detail Extent (% of site)
Forest Native coniferous woodland  minor
Grassland Humid grasslands  minor
Wetlands (inland) Fens, transition mires and springs; Rivers and streams; Standing freshwater; Water fringe vegetation  major
Artificial - terrestrial   minor

Land use

Land-use Extent (% of site)
agriculture -

Protection status National High International High IBA overlaps with Nature Reserve (östen, 1,420 ha). 1,010 ha of IBA covered by Ramsar Site (östen, 1,010 ha). IBA overlaps with Special Protection Area.

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Lake Östen. Downloaded from on 26/10/2016

To provide new information to update this factsheet or to correct any errors, please email BirdLife