Frogs are usually small animals that have smooth, moist skin, bulging eyes, and external eardrums behind the eyes; the adults lack a tail. Frogs have long hind legs, and most species can take long leaps. Many species also have webbed feet, making them excellent swimmers. Most frogs, especially males, are quite vocal. As the frog forces air through the voice box, or larynx, the vocal cords vibrate to make calls distinctive of its species. A much louder sound is produced by the males of species that…
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