What structures on the Io moth caterpillar are responsible for delivering a painful sting upon handling?

Answer

Branching, urticating spines

The Io moth caterpillar is defended by branching spines that are urticating, meaning they can break off into the skin and release a chemical irritant or venom, causing a sting reaction.

What structures on the Io moth caterpillar are responsible for delivering a painful sting upon handling?

#Videos

IO Moth Caterpillars Can Sting - YouTube

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