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Descrição
More than 230 species of birds have been recorded in and around Østensjøvannet. In summer the lake hosts a large colony of Guincho-comum, as well as populations of Mergulhão-de-crista, Galeirão-comum, Galinha-d'água and Zarro-negrinha. You can also find Escrevedeira-dos-caniços, rouxinol-dos-caniços and the occational Felosa-assobiadeira here.
It is a popular area for recreation, and there is a path all around the lake with plenty of good viewpoints. The path brings you quite close to the water's edge. There is also a bird hide on the west side of the lake, which provies good views of the central parts.
During spring and autumn the lake is used as a stopover by numerous species, such as Pato-trombeteiro, Mergulhão-de-pescoço-castanho and waders.
In winter, large flocks of Pato-real stay at the lake, with the occational Arrabio and Piadeira thrown in. Various geese and Galeirão-comum are also known to winter here. As a bonus, encountering Chapim-rabilongo is not uncommon during the colder months.
Detalhes
Acesso
There is a parking site south of the lake. The area can also be reached by bus (Abildsø) and the subway (Skullerudåsen, Bøler). The paths around the lake are mostly prepared for biking, but walking around the lake (with plenty of stops) won't take more than about 2 hours (4,5 km).