[1
]Institute of Landscape Ecology, University of Münster, Münster, Germany
[2
]Khinganskiy Federal Nature Reserve, Ministry of Nature Resources and Ecology, Arkhara,
Russia
[3
]Alfred Wegener Institute Helmholtz Center for Polar and Marine Research, Polar Terrestrial
Environmental Systems, Potsdam, Germany
[4
]Department of Life Sciences and Systems Biology, University of Turin, Torino, Italy
[5
]Department Bird Migration, Swiss Ornithological Institute, Sempach, Switzerland