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A bony extension on the head of of a bird. Cassowaries and hornbills have a casque, typically larger in the male[1].



Location of the casque on a hornbill

Location of the casque on a guineafowl.



References

  1. ^ Frances, Peter; et al. (2007). Bird: The Definitive Visual Guide. Dorling Kindersley Inc. ISBN 1564582957. 
Anatomy of an amiotic egg.svg This article is part of Project Glossary, a All Birds project that aims to write comprehensive articles on each term related to animals.


Little Pied Cormorant.jpg This article is part of Project Anatomy, a All Birds project that aims to write comprehensive articles on each anatomical term related to birds.
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