The Ultimate Water Bags as Fly Deterrent Quiz

By: Staff

4 Min Quiz

Image: refer to hsw

About This Quiz

Have you ever noticed clear, water-filled plastic bags hanging in restaurants and wondered just what these were for? Take this quiz and see how a bag of water can keep flies away.

If you see a bag of water hanging in a restaurant, what could be the reason?

There is a belief that clear bags of water can keep away flies.

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Why bother to chase flies away?

Other than being a nuisance, they are a health hazard because they spend quality time in dumpsters, on animal droppings and other sources of germs.

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What do some advocates of hanging a plastic bag of water insist on adding to the water?

They insist on adding flakes of floating tin foil.

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Why, according to popular theory, would a clear bag of water drive away a fly?

One theory is that the sight of its own magnified reflection scares the fly away.

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What is the most common reasoning for his method among entomologists?

Since the fly has a pair of large complex eyes, the light refraction caused by the water in the plastic bag confuses it and so it leaves in a hurry.

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How many simple eyes are there in each complex fly eye?

Each eye consists of 3,000 to 6,000 simple eyes.

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How do critics classify water bag success stories?

These success stories are regarded as old wives' tales.

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Why could the water bag seem to work?

This could be a result of the placebo effect: People expect it to work and so think it actually works.

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What did a study using commercial, water-based optical repellants on two egg farms show?

It showed that areas equipped with the water bags in fact experienced higher levels of housefly activity.

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What does the study mean for homes or restaurants?

It is inconclusive, since it was not conducted under direct sunlight.

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