The Hickory Horned Devil
This may be one of the most terrifying caterpillars you’ve probably seen in your entire life, but you have nothing to worry about. Found in the pine forests of the United States, the hickory horned devil is the caterpillar stage of the regal moth or royal walnut moth. Those spines along its body are only intimidating and aren’t actually sharp or carry any toxin. Another defense mechanism they have is that they curl up into a ball on the ground and look like bird poop so that nothing else becomes interested in trying to eat it.