Enthusiastic engineers are launching “flying aircraft”—flying devices designed on the principle of “flapping flight.” Insects flutter over flowers and herbs. A 270-million-year-old butterfly wing imprint. A collection of butterflies behind a glass showcase. Macro photography of insects in flight. Macro photography of an insect wing. An entomologist using a scanning electron microscope examines the microstructure of an insect's wing. A winged model, created according to the “flapping wing” principle, floats on the water. Doctor of Biological Sciences A.K. Brodsky, an employee of the Department of Entomology at Leningrad University, secures a butterfly in front of the device and examines its flight in a laser beam. Candidate of Biological Sciences O.M. Bocharova-Messner talks about the features of insect aircraft that are promising for use in technology. A deltolaner floats above the ground.