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...Marco KleinHeerenbrink; Kajsa Warfvinge; Anders Hedenström ABSTRACT Gliding flight is a relatively inexpensive mode of flight used by many larger bird species, where potential energy is used to cover the cost of aerodynamic drag. Birds have great flexibility in their flight configuration, allowing...

...P. Henningsson; A. Hedenström SUMMARY Gliding flight performance and wake topology of a common swift ( Apus apus L.) were examined in a wind tunnel at speeds between 7 and 11 m s –1 . The tunnel was tilted to simulate descending flight at different sink speeds. The swift varied its wingspan, wing...