Flies vs the Water Bag

You probably seen it all around. Hawkers place them near their food items are one of the most common places for them.

Yes, I am talking about a simple plastic bag filled with water. It is a fly deterrent devise that works. Exactly how? well thats the interesting portion.

Apparently flies have ultra sensitive eyes and capture images from a large view angles. The water bag works like a reflective globe, that is constantly reflecting lights and images around. As such, any slightest moment would be reflected onto the water bag, thus causing an impression that something has moved.

With flies sensitive to any movement, this simply scares them off.

Interestingly, I recalled going to a particular Rims and wheel shop with Martin and we saw the water bag hanging there. How amusing we tot.