Why Female Dragonflies Fake Death
May 7, 2017
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3:15Now PlayingWhy Female Dragonflies Fake Death
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as posted by the channelA researcher recently discovered something crazy about female dragonflies. Ana Kasparian, Ben Mankiewicz, and Mark Thompson, hosts of The Young Turks, discuss. Tell us what you think in the comment section below.
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"Female dragonflies use an extreme tactic to get rid of unwanted suitors: they drop out the sky and then pretend to be dead.
Rassim Khelifa from the University of Zurich, Switzerland, witnessed the behaviour for the first time in the moorland hawker dragonfly (Aeshna juncea). While collecting their larvae in the Swiss Alps, he watched a female crash-dive to the ground while being pursued by a male.
The female then lay motionless on her back. Her suitor soon flew away, and the female took off once the coast was clear.
“I was surprised,” says Khelifa, who had never previously seen this in 10 years of studying dragonflies.
Female moorland hawkers are vulnerable to harassment when they lay their eggs since, unlike some other dragonflies, they aren’t guarded by their male mates. A single sexual encounter with another male is enough to fertilise all eggs and copulating again could damage their reproductive tract.
Khelifa found that the females often retreat to dense vegetation near ponds at this time, probably to hide. And they often act dramatically when they emerge.”*
Hosts: Ana Kasparian, Ben Mankiewicz, Mark Thompson
Cast: Ana Kasparian, Ben Mankiewicz, Mark Thompson
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