Vocal Sacs


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Related to Vocal Sacs: Vocal Pouch

Vocal Sacs

 

hollow projections of the walls of the mouth cavity in males of ecaudate amphibians. The vocal sacs are filled with air and exhaled; they function as resonators of the vocal apparatus to increase voice power. Most frogs have paired vocal sacs extending from the angles of the mouth; tree toads and other toads have a single projection on the bottom of the mouth cavity.

References in periodicals archive ?
Sex was determined by the everted lateral black vocal sacs and conspicuous corneous nuptial pads on the first finger.
The next day seven males called from water; these males moved around the pond with all legs extended and the black lateral vocal sacs inflated.
Stanley Rand concluded in 1993, so they dismissed the idea of vocal sacs as resonating cavities.
Purgue took a different approach, checking vibration in the walls of vocal sacs and other tissues when he played a range of frequencies.
Dorsum, chest, and gula smooth; belly skin granular; vocal sac prominent tending to be bilobed when inflated; an incomplete chest fold, folds of skin at wrist, knee and heel; axillary membrane small.