Max Planck Institute of Animal Behavior Radolfzell 78315 Germany;
Department of Biology University of Konstanz Kon-stanz 78457 Germany;
School of Ecology and Nature Conservation Beijing Forestry University Beijing 100083 China;
German Aerospace Center ( DLR) Earth Observation Center German Remote Sensing Data Center Wessling 82234 Germany;
ICube-SERTIT University of Strasbourg Strasbourg 67081 France;
Wildlife Science and Conservation Center of Mongolia Ul-aanbaatar 14210 Mongolia;
School of Ecology and Nature Conservation Beijing Forestry University Beijing 100083 China;
International Crane Foundation Wisconsin 53913 USA;
Max Planck Institute of Animal Behavior Radolfzell 78315 Germany;
Department of Biology University of Konstanz Kon-stanz 78457 Germany;