The goliath frog of West Africa is the world’s largest frog, capable of growing up to 15 inches in length and weighing up to 7 pounds. This unique creature has vocal sacs, pouches of skin that fill with air and resonate sounds like a megaphone. Thanks to this feature, male frogs can produce loud calls that can be heard from miles away.
On the other hand, the Paedophryne amauensis frog from eastern Papua New Guinea is the smallest frog in the world, measuring only 7mm (0.27 inches) long. Many poisonous frogs, such as the golden poison frog and dyeing poison frog, have bright colors to warn predators of their toxic skins.
In extreme environments like the Arctic circle, the wood frog has a unique adaptation that allows it to survive. This frog can live with 65% of its body frozen thanks to glucose in its blood acting as antifreeze that protects its vital organs from damage. This adaptation enables the wood frog to survive freezing temperatures for extended periods.