vocal sac

British  

noun

1. 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

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 • Jun. 12, 2017

During breeding, the male’s vocal sac, almost as large as the animal itself, is usually the first thing you will spot.

From New York Times • Apr. 3, 2015

The vocal sac in breeding males is quite evident; it is single, median, and when expanded, spherical.

From A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, Mexico by Duellman, William E.

The flanks, belly, and vocal sac are yellow, and the anterior and posterior surfaces of the thighs and webbing of the feet are bright orange-red or tomato red.

From A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, Mexico by Duellman, William E.

The vocal sac is moderately large and bilobed.

From Neotropical Hylid Frogs, Genus Smilisca by Duellman, William E.