Wadden Sea Ecosystem 34: Trends of Migratory and Wintering Waterbirds in the Wadden Sea 1987/1988-2011/2012

The Joint Monitoring of Migratory Birds (JMMB) Group presents 25- and 10-year trends on 34 migratory bird species up to 2011/2012. For the first time trends of 10 sub-species are included in the progress report.