Saturday, April 29, 2017

Some dragonflies

FEMALE DRAGONFLIES FAKE DEATH TO AVOID MALES HARASSING THEM FOR SEX:
"Khelifa suggested this behavior is common among the female of this dragonfly species, and that it could have evolved for a number of reasons: “On one hand, this behavior could have resulted from exaptation. Since death feigning already exists in the behavioral repertoire of dragonflies, females of the moorland hawker expanded the use of this anti-predatory function to avoid male coercion,” he wrote. “On the other hand, the origin of this exaptation is probably sexual conflict where each sex adopts reproductive strategies that best serve its own survival and reproductive success.”"

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