Recordings at the east and west side of lake Østensjøvannet nature reserve in Oslo May 21 2013. Swans at nests, Moorhens, Great Crested Grebes and other birds May 21 2013. Sony HDR-CX260. Edited in Sony Vegas.
About lake Østensjøvannet ostensjovannet.no/besok/english-webcopy.pdf ostensjovannet.no