Scorpionflies: The Insects with a Deceptive 'Scorpion Tail'

In forests and meadows worldwide, scorpionflies (order Mecoptera) perplex onlookers with a curious feature: a tail that resembles a scorpion’s stinger, but serves an entirely different purpose. Contrary to appearances, this bulbous, curved appendage at the insect’s rear is not a venomous weapon—but rather the male’s elaborate genitalia, a bizarre evolutionary trait that has fascinated entomologists for centuries.