This video is about mute swans in nature reserve De Grote Vilt in the Netherlands in 2010.
Translated from the Dutch AQUON hydrobiologists:
Monday, May 12, 2014
In the nature reserve Grote Vilt in East Brabant, the water mite Lebertia oblonga has been found, a new species for the Netherlands. At the Grote Vilt, measures were taken in 2010 to improve water quality and ecological quality of the water in the area. Now, several years later, the measures appear to have an effect. The water quality has indeed improved. The water has become less nutritious and more and more unusual species are found: the new water mite and rare pioneer species including rare nonbiting midges, bugs and water beetles.