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Walking on the ceiling upside down requires a careful balance of adhesion and weight, and specialized trekking tool to combat the tug of gravity, but how they are able to walk on the ceiling?
Let's know,
Each fly foot has two fat footpads that give the insect plenty of surface area with which to hold on upside down.
The adhesive pads on the feet are called as pulvilli. This pulvilli has come equipped with tiny hairs that have spatula like tips. These hairs are called as setae.
Scientists once thought that the curved shape of the hairs suggested that flies used them to hold up onto the ceiling.
In fact, the hairs produce a glue like substance made of sugars and oils.
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