From West Africa comes the goliath frog, the world’s largest amphibian that can grow up to 15 inches in length and weigh as much as 7 pounds. This impressive creature has a unique feature – male frogs possess vocal sacs, which are pouches of skin that fill with air and produce resonant sounds similar to a megaphone. These powerful calls can be heard from miles away, helping them attract mates and ward off predators.

On the other end of the spectrum is the Paedophryne amauensis frog from eastern Papua New Guinea, which holds the title of the smallest frog in the world at just 7mm (0.27 inches) long. Despite its diminutive size, this frog is still capable of producing toxic skins that deter predators from attacking it.

In contrast to these two extremes is the wood frog, which has a remarkable adaptation that allows it to survive in freezing temperatures like those found in the Arctic circle. The wood frog has a special mechanism that allows it to 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 endure harsh winter conditions for extended periods.