What chemical defense mechanism can the Atlas moth caterpillar deploy against threats like ants or lizards?

Answer

Expelling a secretion carrying a powerful, foul odor

When threatened, the larva can expel an irritant spray that carries a powerful, foul odor, capable of deterring predators from distances up to nearly 20 inches.

What chemical defense mechanism can the Atlas moth caterpillar deploy against threats like ants or lizards?
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