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].
obmutescens by having a subgular vocal sac
and vocal slits (lacking in P.
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.
* Among Darwin frogs, it is the male who swallows and stores the developing tadpoles in his vocal sac
until juvenile frogs emerge.
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.