Greylag Geeses at the lake Østensjøvannet, Oslo - KLICK for larger version
Østensjøvannet is a lake in Oslo, capital of Norway. It is well known for the wide variety of birds and other wildlife that can be found there. It is surrounded by the Østensjø borough. It is currently a wildlife preserve, though urban development posed a serious threat to the lake and its environs during the 1980s and early 1990s.