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Each female fly is capable of laying up to 2000 eggs many of which may reach adult life with in twelve days. These new young flies are then ready to start the cycle all over again.

WHY FLIES ARE DANGEROUS

Flies do not only carry germs on their feet and legs, but also inside their bodies. Every fly has a sort of pouch or reservoir which it fills when it eats. After taking a full meal at some filthy rubbish dump, the fly wings its way to some more comfortable spot where it can rest and digest its meal. There the fly transfers this filthy material from the pouch to its own stomach often leaving parts of the meal behind. This is what causes fly spots on walls and ceilings, and perhaps even on your own food if you are careless enough to allow flies inside your house.

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Q: What are fly spots or the marks on walls due to flies?
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