STEPHEN J. KRASEMANN / SCIENCE PHOTO LIBRARY STEPHEN J. KRASEMANN / SCIENCE PHOTO LIBRARY
Caterpillar mimicking snake. Head of a caterpillar (family: Lepidoptera) which resembles a snake to deter predators. The imitation of a dangerous or toxic animal by an edible, harmless one is known as Batesian mimicry. Photographed in a rainforest in Costa Rica.
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