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8 uncanny animal lookalikes

By: Anna Norris on Nov. 5, 2013, 10 a.m.
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Coral snakes and milk snakes

Here's a mnemonic that could save your life one day: "Red on yellow will kill a fellow; red on black is a friend of Jack."

Coral snakes (like the one on the left of the photo) are not aggressive but possess extremely potent venom. Milk snakes, a kind of king snake, are harmless but benefit from similar coloring to their dangerous cousins. When a nonthreatening species evolves to look like a harmful one, the phenomenon is called Batesian mimicry, named for the 19th-century English naturalist H.W. Bates.