Issue:ISSN 2095-1353
CN 11-6020/Q
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2009年46 No.5
Observations on takeoff behavior of Yemma signatus
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Key Words：Yemma signatus, takingoff, free flight, wingbeat cycle
Abstract：The takeoff behavior of a berytid bug, Yemma signatus (Hsiao), in free fligh
t was recorded by highspeed camera, and analysized in this paper. In the first
wingbeat cycle of the bug, the ratio of the time of flapdown to the time of f
lapup is 22∶9. In the following 4 wingbeat cycles the ratio decreases grad
ually. In and after the fifth wingbeat cycle the ratio is 1∶1. The takingoff
time (1st-5th wingbeat cycles) of the bug is 43 milliseconds.