Since 1995, Anders Hedenström has worked as a Professor of Theoretical Ecology at Lund University, Sweden. After completing a PhD on the ecology of bird flight (with Thomas Alerstam as his advisor) he conducted postdoctoral research on insect flight at Cambridge in the UK, before moving back to Sweden to set up his own research programme. A new wind tunnel designed for animal flight studies became his main instrument for investigating the aerodynamics and energetics of bird and bat flight. He has also been part of the Centre for Animal Movement research, where novel biologging studies involving flight activity recorders have been developed, for example, used to show that Common Swifts (Apus apus) are airborne throughout their non-breeding period. He is currently involved in a five-year project on the efficiency of bird migration. His research is also funded by the Swedish Research Council.