Friday, April 28, 2017

"Female dragonflies fake sudden death to avoid male advances"

Via TwitterFemale 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.

(Link to more)

7 comments:

Evi L. Bloggerlady said...

I have heard rumors human beings employ a similar strategy at times.

Sixty Grit said...

Rassim Khelifa says muslim women need to be stoned to death. Film at 11.

ndspinelli said...

I guess a headache doesn't cut it w/ dragonflies.

Leland said...

And they often act dramatically when they emerge.

Do tell.

Methadras said...

Did Khelifa scream Aloha Snackbar as he attempted to behead the Kafir apostate dragonfly?

ricpic said...

She just lay there and the male dragonfly flew away? Nature's way of eliminating timid males.

Methadras said...

well, if the male still came after her to screw her then it would be rape and that's a no-no, unless you are a goat fucking follower of the beheading pedophile.