Frogs are a diverse group of amphibians with unique characteristics and adaptations. On one end of the spectrum, there is the goliath frog from West Africa, which holds the title for being the largest frog in the world. Growing up to 15 inches in length and weighing up to 7 pounds, this impressive amphibian dominates its environment with its size and weight.

On the other end of the size spectrum is Paedophryne amauensis from eastern Papua New Guinea, which is considered the smallest frog in the world. Measuring only 7mm (0.27 inches) in length, this tiny frog may hold the distinction as not only the smallest frog but also potentially the smallest vertebrate in existence.

Male frogs have another unique feature: their vocal sacs, pouches of skin that fill with air, allow them to produce loud sounds that can be heard from a mile away. This adaptation sets them apart from other creatures in the animal kingdom and has made them an essential part of their environment.

Many poisonous frogs like dyeing poison frog and golden poison frog display bold and bright colors as a warning to predators about their toxic skins. These vibrantly colored frogs stand out in their environments, signaling danger to any predators that may consider them prey.

The wood frog’s remarkable adaptation allows it to survive in Arctic circles’ extremely cold environment by producing glucose antifreeze in its bloodstream. This enables it to remain frozen for weeks while only 65% of its body remains unfrozen, protecting its vital organs from damage while keeping itself alive during harsh winters’ freezing temperatures.