Christian is head of the Department of Evolutionary Ecology at the Leibniz Institute for Zoo and Wildlife Research (www.leibniz-izw.de) in Berlin, where he leads the batlab group (www.batlab.de). His research is at the interface between behavioral ecology and physiology and is targeted to solve conservation questions. Specifically, he studies behavioral and physiological responses of wildlife species to land use changes and global climate change, using bats as model species.