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Painted natural-history illustration of a red-crested pileated woodpecker gripping a vertical tree trunk in a dawn forest, its straight bill meeting the wood and small chips marking the impact; a faint earlier head position suggests the short pecking movement.

Why Can a Woodpecker Use Its Head as a Hammer?

Woodpeckers combine a stiff striking head with a small brain. Their impact tolerance depends on size and mechanics, not simply a cushioned skull.

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