Amazing animals — A look at the weird and wonderful species that live on our planet

Paradoxical frogs — also known as shrinking frogs — are about three times bigger as tadpoles as they are when adults.

The forests of Borneo are home to squirrels with extravagant tails and teeth so sharp they could slash a deer's throat — and folklore has it that's exactly what they use them for.

Sand strikers — also known as bobbit worms — reach up to 10 feet long. They have razor-sharp jaws they use to catch unsuspecting fish and can split into bits to regenerate.

Clouded leopards can rotate their ankle joints by almost 180 degrees and they kill prey by biting the back of their necks with their huge teeth.

Ocean pout live in frigid waters from Labrador in Canada to North Carolina and have evolved a blood protein that serves as antifreeze.

Hercules beetles can grow to almost 7 inches long and are among the largest flying insects on Earth.

Arabian sand boas live in deserts on the Arabian Peninsula, where they lie buried in the sand with only their derpy eyes peeking out as they wait for prey.

Rather than throw its old head cases away, the gum leaf skeletonizer wears them like a hat to protect itself from predators.

Researchers are only beginning to understand the cryptic lives of the earless monitor lizards of Borneo.

Darwin and fellow naturalist Alfred Russel Wallace predicted the existence of Wallace's sphinx moth from an orchid with an extremely long nectar tube.