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Some insects make sounds., , Zeet-Zeet-Zeet!, , , , Cree-Cree-Cree!, Ch-Ch-Ch-Urrrr!, , On a hot summer night you can hear some of these sounds., na s, , How do you make a sound? You do it with your mouth or voice. But none, of the insects makes its noise with its mouth. Insects don’t have any voice., , A male katydid rubs it wings together and makes its noise. On one wing, the katydid has a row of little teeth. On the other wing is a hard scraper. The, , katydid rubs the scraper over the teeth to produce sounds. You can make the same, kind of noise. Rub a pencil over the teeth of a comb and listen!, , Most insects fly and make buzzing sounds. The, down in the air and thus they make a loud buzzing., , We hear with our ears. How does an insect hear? Most, no ears. Do you know it?, , and katydids have ears but, on its sides and a katydid', , y move their wings up and, , of the insects have, Of course some insects such as grasshoppers, crickets, , the ears are in strange places. A grasshopper's ears are, S €ars are on its legs!, , , , , , , Katydid, , This hole is katydid's ear,