grateful to Puget Sound Chapter of the American Association of Zoo. This feature comes from hadrosaurids from more than 60 million years ago. galeritus, Wreathed Hornbill Aceros undulatus, Rhinoceros Hornbill Buceros rhinoceros and. Rhinoceros hornbills have one of the largest and most impressive casques.It is believed that it acts as a resonating chamber and helps birds to sound loudly across a large distance. Rhinoceros hornbills' casque is made of keratin and is hollow inside.At the age of 6 years, the casque and bill become orange and red this color comes from preen oil which birds rub on from the preen gland above the tail during grooming to help keep their feathers healthy. The great hornbill, a member of the hornbill family, is the official state bird of Kerala, an Indian state. The Rhinoceros hornbill is the official state animal of Sarawak, a Malaysian state located in Borneo. Rhinoceros hornbills have a huge casque and bill which are white in color when birds are born. Hornbill was used as the official mascot of one of Malaysia's political parties, the Democratic Action Party.
The Rhinoceros hornbill is the state bird of the Malaysian state of Sarawak and the country's National Bird.
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