Insect Expert Explains Why Flies Rub Their Creepy Legs Together

While I’m terrified of daddy longlegs (even learning that they’re completely harmless hasn’t helped), I’m a bit more tolerant of spiders and flies.

There’s one exception, though. I do not like it when bluebottles sit on my windowsill, rubbing their creepy legs together like they’re plotting my downfall.

Of course, that won’t be the real reason behind the movement. But to be honest, I had no idea what was – until recently.

Why do flies rub their legs together?

Speaking to The New York Times, Dr........

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