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8 uncanny animal lookalikes

Spicebush swallowtail caterpillar (L) and common green snake (R)

Photo: John Flannery/Flickr; Laurence Johnson/Flickr

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Swallowtail caterpillars and snakes

When you share a common predator, like birds, it's good to be — or look like — a snake! The incredible spicebush swallowtail larva (left) mimics the common green snake (right) in both pattern and behavior; these clever caterpillars will raise the front of their bodies to look like a snake about to strike, and they even stick out an organ that looks like a snake tongue!