New findings represent the first evidence of male genitalia playing a defensive role in the animal kingdom.
To test whether these male pseudostingers might deter attackers, the researchers placed male mason wasps inside an enclosure with one of their predators, a tree frog. As the frogs attacked the wasps every time, the wasps fought back with their piercing penises—and got spat back out about one-third of the time . Male wasps that had their pseudostingers removed uniformly became frog food.
The findings represent the first evidence of male genitalia playing a defensive role in the animal kingdom. Now that they know what to look for, the researchers suspect they’ll find similar tactics in other wasps.
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