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Yellow-casqued wattled
hornbill (Ceratogymna elata) Lithograph, by John Gerrard Keulemans, published 1882 |
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Native to the rainforests of West Africa, this hornbill has a casque, the helmet-like structure on its bill, which amplifies its loud booming calls across the dense forest, helping it communicate with its mate or group. In this illustration, Keulemans depicts an adult bird alongside a juvenile. |
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