Data from: Where do wintering cormorants come from? Long-term changes in the geographical origin of a migratory bird on a continental scale

Morten Frederiksen, Fränzi Korner-Nievergelt, Loïc Marion & Thomas Bregnballe
1. Populations of migratory birds often mix to a considerable extent in their wintering areas. Knowledge about the composition of wintering populations is highly relevant in relation to management, not least for species, such as the great cormorant Phalacrocorax carbo sinensis, prone to conflicts with human interests. However, few studies have been able to estimate long-term changes in winter population composition. 2. We use 30 years of ringing and recovery data (1983-2013) from all major...
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