DR. JOHN BRACKENBURY / SCIENCE PHOTO LIBRARY DR. JOHN BRACKENBURY / SCIENCE PHOTO LIBRARY
Cinnabar moth caterpillars (Tyria jacobaeae) on ragwort (Senecio jacobaea). The yellow and black colouration of these caterpillars acts as a warning to predators that they are poisonous. They gain their poison though eating ragwort and sequestering its toxic pyrolizidine alkaloids.
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