Vocal Sac
Vocal Sac
In some frog species, you can determine the sex of a frog based on the development of a vocal sac. If the vocal sac is present, the frog is a male.
Because only the males calls.
The lungs, nostrils, skin, and vocal sac.
Although I am not entirely sure, I think it might be an egg sac or a vocal sac? Not entirely sure though. Try researching it in Google under the description you gave us.
because only males emit mating calls.
You are possibily reffering to the inflation and deflation of a frogs "VOCAL SAC."
The address of the Sac County Historical Society Inc is: Po Box 334, Sac City, IA 50583
In some frog species, you can determine the sex of a frog based on the development of a vocal sac. If the vocal sac is present, the frog is a male.
Poison Dart frogs like to mate in the Spring!
bullfrogs make noise by vibrating an organ in their throat. this produces a throaty, croaking noise.