vocal sac


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vocal sac

n.
An inflatable pouch on the floor of the mouth cavity of a male frog that amplifies sounds produced by the vocal cords.

vocal sac

n
(Zoology) 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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In this undated photo provided by researchers in December 2018, a male tungara frog in Panama uses his vocal sac to call out in Gamboa, Panama.
The bats' sonar spies the amphibians' ballooning vocal sac (shown), turning a sexual display into an invitation for lunch.
A few were captured after bouts and also identified as males due to the presence of a vocal sac. Female cricket frogs were noticeably larger than males (Z = 4.9, P < 0.0001; females: mean SVL = 25.1 [+ or -] 1.69 mm SD; males: mean SVL = 22.5 [+ or -] 1.78 mm SD).
Frogs call by moving air from the lungs through the larynx into the mouth and vocal sac. A pair of vocal membranes passively vibrates producing sound as the air crosses the larynx [17-20].
A male red-eyed tree frog's call sounds like a "chuck-chuck." To produce this call he takes a big gulp of air that puffs up the vocal sac in his throat until it looks Like a big bubble.
To beat their competitors in the fight for females, these tiny frogs have a built-in volume control: an inflatable vocal sac (balloonlike pouch) beneath the mouth.
This bubble is called a vocal sac, and it makes my calls louder.
Males have large vocal slits positioned just anterior to the rictus and opening into a single large vocal sac. Externally, males lack accessory sexual characteristics such as nuptial excresences; their venters appear to be more granular than the venters of females.
I got to spend my first six weeks living and growing in your vocal sac. It was nice and safe in there.