Along with a keen sense of smell, house flies have yet another superpower up their sleeve in the form of compound eyes. To put it simply, compound eyes are made up of thousands of extremely tiny individual ‘eyes’ or lenses – 27,000 to be precise!
The light-sensitive structures that make up the compound eyes give flies an amazing ability to perceive movement from all angles. In fact, they’re so sensitive that the eyes can even perceive a change in the air currents!
That’s also the reason why flies seem to have the extraordinary ability to detect when a shoe is rolled magazine is coming at them and being quick enough to fly to safety right before that!