As we all know, it is almost impossible to catch a fly. The insect has specialized hind wings that help it take off from a stationary position in an instant to avoid imminent danger. As a result, they are hard to shoot. In general, flies mainly use vision to escape danger.
Original title: angry! Why can't we catch flies
Author: Xin Yu
Recently, Alexandra yarger and his team at Case Western Reserve University found a new mechanism to help them escape from danger. The relevant research results were published in the Journal of the Royal Society B: Biological Sciences on January 13.
All kinds of flies are known as the shortened hind wings of the balance stick, which do not produce useful lift, but act as a sense organ to help insects maintain balance in flight.
Petaled flies include houseflies and green headed flies, which can move their hind wings rhythmically when they are still.
"This insect is the only group to do this, but why they do it is still a mystery." Yarger said.
Yarger's team tested whether this behavior affected the fly's take-off.
Using high-speed cameras, the researchers photographed the flight of more than 20 species of flies and found that the petal flies take off at about five times the speed of other flies.
The team then removed the balance bar and found that the takeoff speed and stability of the petal flies decreased.
Yarger believes that the hind wing movement of petal flies increases the amount of sensory information they receive, but it is still unclear what information they can sense and how this information is processed.
"We think there might be a path for information to go from the bar to the legs and make them take off faster. This path does not pass through any central nervous system, which is almost a kind of conditioned reflex. " She said.
Fast take-off will help the flies avoid injury. "That's part of the reason they can escape very quickly."
Jessica fox, a member of the research team, said that the transition from take-off to flight is a challenging thing, and the balance bar is obviously very beneficial to this transition.