Maja Jurc, University of Ljubljana, Bugwood.org

Robert Dzwonkowski, Bugwood.org

Gyorgy Csoka, Hungary Forest Research Institute, Bugwood.org

Gyorgy Csoka, Hungary Forest Research Institute, Bugwood.org

Beat Forster, Swiss Federal Institute for Forest, Snow and Landscape Research, Bugwood.org

Daniel Adam, Office National des Forêts, Bugwood.org

Robert Dzwonkowski, Bugwood.org