Scare Tactics

Credit: Daniel H. Janzen

The physical appearance of caterpillars and chrysalises can be used as protection against insect-eating birds.  A researcher has dedicated 32 years of his life to studying the phenomenon in Costa Rica. Dr. Janzen and his colleagues have studied over 450,000 caterpillars representing 15,000 species and the results revealed how these helpless creatures ward off birds through creating snake-looking eyes along with other physical attributes.

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