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Location Iceland, Árnessýsla
Central coordinates 21o 15.00' West  63o 57.00' North
IBA criteria B1i, B2
Area 7,400 ha
Altitude 0 - 19m
Year of IBA assessment 2000

Fuglavernd - BirdLife Iceland (Partner Designate)

Site description An extensive area of coastal flood-plain and shallow freshwater marshes by the ölfusá river, c.35 km south-east of Reykjavík. The area extends over ölfusforir, Kaldadarnesengjar, Flóagafl and the outlet of the ölfusá river, and includes a vegetated lava-flow. The area is dominated by sedge Carex. Land-uses include angling in rivers and some tourist traffic.

Key Biodiversity Many other species of waterbird also breed, and it is one of the most important inland wintering sites for ducks in Iceland.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Greater White-fronted Goose Anser albifrons passage  1,000 individuals  B1i  Least Concern 
Gallinago gallinago passage  10,000 individuals  B1i  Not Recognised 
Black-tailed Godwit Limosa limosa breeding  1995  200-500 breeding pairs  B2  Near Threatened 
Dunlin Calidris alpina breeding  1,000 breeding pairs  B1i  Least Concern 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Unknown I Nature Reserve 300 protected area contained by site 300  


IUCN habitat Habitat detail Extent (% of site)
Grassland   10%
Wetlands (inland) Fens, transition mires and springs; Rivers and streams; Standing freshwater; Water fringe vegetation  -
Coastline Tidal rivers & enclosed tidal waters  -

Land use

Land-use Extent (% of site)
agriculture -
hunting -
fisheries/aquaculture -
nature conservation and research -

Protection status National Partial International NoneAbout 3,000 ha of IBA covered by Nature Reserve (name not known, c.3,000 ha).

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

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