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
obmutescens by having a subgular vocal sac
and vocal slits (lacking in P.
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.
Diagnosis: (1) skin of dorsum shagreen with flat warts, that of venter areolate; short dorsolateral folds present; (2) tympanum round, its length 45-54 % that of eye; (3) snout short, subacuminate in dorsal view, rounded in profile; canthus rostralis sharp; (4) upper eyelid narrower than interorbital distance, no cranial crests; (5) vomerine odontophores oval; (6) vocal sac
and nuptial pad present in males; (7) first finger shorter than second; fingers lack disks but with ventral pads; (8) fingers bear lateral keels; (9) ulnar tubercles present, fusing to form ridge; (10) round tubercle on heel; outer tarsal fold present; short inner tarsal fold; (11) inner metatarsal tubercle oval, 1.
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
Da Silva (1998) did not include vocal sac
architecture as one of his characters but this character must represent some sort of homoplasy, given his cladogram.
I got to spend my first six weeks living and growing in your vocal sac
The vocal sac
is subgularly poorly developed and possess lateral extensions to the area behind the jaw angles.