DR MORLEY READ / SCIENCE PHOTO LIBRARY DR MORLEY READ / SCIENCE PHOTO LIBRARY
Caterpillar feeding on leaves of Cynanchum quitense, a plant belonging to the milkweed family (Asclepiadaceae). Many of these plants are toxic, causing the caterpillars that feed on them to become toxic also. The bright orange colouration probably serves as a warning to predators that the caterpillar is poisonous. Photographed near Quito, Ecuador.
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