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Why do frogs croak?
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Male frogs croak during the mating season. Female frogs listen to the croaking and this allows them to find the males. The louder a male frog croaks the more likely he is to attract a partner. For this reason many types of male frog have special air sacs that help to make their croaking louder. A puffed-up air sac acts as a resonator, boosting the volume of each croak. | | A bullfrog inflates its air sac to make its croak sound louder. |
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Previous:
Back
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Book:
1001
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Section:
Nature
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Chapter:
Amphibians
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