The world's largest caterpillar is the hickory horned devil (Citheronia regalis).
The larva of the royal moth can grow up to 6 inches long and 1 inch in diameter, resembling a hot dog.
The hickory horned devil has a unique look, with bright green skin and sharp, spiky horns.
They have short, barbed hairs as well. These hairs can irritate human and animal skin, although they are not harmful.
Hairs from hickory horned devils are thought to be used in traditional medicine to alleviate toothaches and skin ailments.
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