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Toucans’ Beaks Can Be 4x the Size of Their Heads.

Toucans’ large, colorful bills can be up to 4x the size of their heads! They use their beaks to reach food located far out on branches or deep inside tree cavities. Their beaks may also be used to attract mates and scare away predators. Despite their large size, toucan bills are actually quite light — they are hollow inside except for a network of criss-crossing fibers and are mostly made of keratin.

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