"flight muscles" . . . "ability to fly" . "Insect flight#Leading edge vortex" . "insect" . "indirect flight" . "wings" . "wing case" . "flying ancestor" . "winged insects" . "flying insect" . "insects" . "ascend" . "flying" . . "Insect flight" . "Weis-Fogh clap and fling mechanism" . "flight" . "direct" . "thoracic flight muscles" . "insect flight" . . "powered directly" . "vortex theory of insect flight" . "fly" . "flight muscle" . "paranotal-hypothesis" . "Vortex theory of insect flight" . "flying insects" . "Insect flight#Clap and fling" . "wing" . "flight mechanism" . "Flight" . "Insect flight#Aerodynamics" . "Insect flight" . . "flight posture" . . "Insect flight#Mechanisms" . "indirect flight muscles" .