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The purpose of a duck's beak is to allow the duck to quack. The quack sound resonates when the diaphraghm muscle contracts forcing the trapped air upwards into the oesophagus. The quacktorial gland in the beak then opens and closes to create an echo effect and therefore creating the sound we hear, commonly known as a quack. This is also why a duck's quack does not echo!

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12y ago
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12y ago

To make the "quack" sound, and to eat bread with

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11y ago

to catch a food

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10y ago

h

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Q: What does the goose use its beak for?
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