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The Guardian - UK
The Guardian - UK
Lifestyle

Why do flies fly under a ceiling lamp during the daytime?

Ditherer … the common house fly
Ditherer … the common house fly. Photograph: Alamy

Why do flies fly under a ceiling lamp during the day time, in a curiously dithering way, then suddenly make a sharp turn, repeating this endlessly - and how do they make that sharp turn?

Anna Hughes, London, W4

• Post your answers – and new questions – below or email them to nq@theguardian.com. Please include name, address and phone number

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