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.
Many other species of waterbird also breed, and it is one of the most important inland wintering sites for ducks in Iceland.
BirdLife International (2019) Important Bird Areas factsheet: Ósasvædi Ölfusár. Downloaded from http://www.birdlife.org on 14/12/2019.