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Post by kleftiwallah on Jul 16, 2020 12:42:14 GMT
Good afternoon everyone, tell me, what are those flies that fly in squares and triangles turning abruptly at the corners in the centre of our conservatory? 
I hope you can figure out what I mean, Cheers, Tony.
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Post by teasel on Jul 18, 2020 21:42:43 GMT
do you mean the common house fly, Musca domestica?
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Post by kleftiwallah on Jul 19, 2020 10:26:12 GMT
They aren't your usual house fly, they are smaller and they don't swoop as house flies do. They just fly making geometrical shapes in the air.
Cheers, Tony.
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Post by Tringa on Jul 19, 2020 12:34:08 GMT
The ones I know look like ordinary houseflies but then I have never had a close look at them. They are fascinating to watch. I can't find a reference now but I have heard if an aircraft could be designed to do perform the same manoeuvrers, the pilot wouldn't survive the first turn.
It seems the fly's halteres provide info to help it do these things.
Dave
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Post by teasel on Jul 19, 2020 22:08:43 GMT
how about the lesser house fly, Fannia canicularis? From wiki " From May to October, the lesser housefly comes frequently into buildings and is noticeable by its peculiar, silent flight in the room center, where it circles down-hanging articles, particularly lamps. It changes the flight direction jerkily. "
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Post by kleftiwallah on Jul 20, 2020 10:22:07 GMT
Good morning teasel, looks like you've hit the nail on the head.
Cheers, Tony.
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Post by teasel on Jul 20, 2020 21:42:16 GMT
I found research has been done analysing the angles and so on when they chase each other, but I'm not into maths. It's amazing what people study  |
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