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great hornbill
bird
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hornbills
- In hornbill
…cm (63 inches), in the great hornbill (Buceros bicornis). Several species, including the striking Rhinoceros hornbill (B. rhinoceros), possess a brightly coloured beak and casque. This striking coloration is the result of the bird’s rubbing its beak and casque against the preen gland beneath the tail, which stimulates the production…
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