Bug image via Shutterstock
It doesnât happen to every single bug, but if you stumble upon an expired roach in the bathroom or a downed fly by the window, youâll find that theyâre frequently flat on their backs, legs in the air. Itâs such a familiar death pose that itâs omnipresent in a Google image search and name-checked in an ab exercise .
One reason this happens so often is the way in which most bugs in our homes meet their untimely end: poison. Insecticides usually work by disrupting nerve impulses and shutting down communication in a bugâs nervous system. In a one-two punch, the poison ravages a bugâs coordination and also causes spasms and convulsions. Once a bug stumbles and lands on its back or spasms so hard that it flips itself over, it usually canât handle the intricacies of righting itself again. There itâs stuck until death takes hold.
Even without a blast of bug spray to nudge it off this mortal coil, dead or dying bugs often land on their backside simply because of their small size. A stiff breeze, a human rushing by or a curious pet are all enough flip a tiny corpse, or an injured bug too weak to flip itself back over.
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