Frogs mate during the rainy season in the tropics. They mate ... To make this sound, a male frog pushes air through his vocal cords into a vocal sac. The vocal sac is a pouch that can be under his mouth or at the sides of his mouth. The vocal anbsp;...
|Title||:||The Life Cycle of Amphibians|
|Author||:||Darlene R. Stille|
|Publisher||:||Raintree - 2012-07-01|