ScienceBird counting on Fehmarn02:52This browser does not support the video element.Science04/04/2014April 4, 2014For 14 years, Bernd Koop has been counting and researching migratory birds on the Baltic Sea island of Fehmarn. His expertise is in big demand with planners of wind farms - especially when it comes to planning the turbines' height.Copy linkAdvertisement