Ziplock FLYCACTHERS?

Has anyone knowledge of how ziplock bags are used as flycatchers? Do they just get filled with water and attract the flies or do the flies acually go inside and drowned. Thanks for any help you can give.

Answers:
They are used to repel flies, the water in the bag magnify's their own image and it scares the bejezus out of them.

Other answers:
I'ts my understanding that they don't attract but repell flys.
I have seen them at open air markets and they seem to work.
flys seem to stay far away.I don't know why.
I'ts my understanding that they don't attract but repell flys.
I have seen them at open air markets and they seem to work.
flys seem to stay far away.I don't know why.
sounds like a wierd pastime
haven't got a clue never heard of it
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