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vocal sac
noun
- zoology either of the loose folds of skin on each side of the mouth in many male frogs that can be inflated and act as resonators
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Example Sentences
They develop inside his large vocal sac, safely hidden from predators.
From National Geographic
Then, with the help of “a secret neck muscle”, Perry releases from under her chin what looks like a frog’s vocal sac.
From The Guardian
One frog only released the mating sounds; the other also inflated a balloon mimicking the movement of a vocal sac.
From The Verge
The researchers found that, when they added background noise, the bats chose the frog with the moving vocal sac 75 percent of the time.
From The Verge
The movement of the vocal sac made them easier to find.
From The Verge
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