Abstract
Hornbills (Bucerotidae) are defined by their casques, structures that are extensions of the beak. The purpose of these structures, which take diverse forms, has been subject to speculation. In this study, it is asserted that a primary function of the casque is thermoregulation, its large vascularised surface area functioning as a structure to facilitate heat exchange. Infrared thermography on a Great Hornbill (Buceros bicornis) revealed that the bird’s casque exhibited significant percentage of heat loss in relation to the body's resting heat production along a temperature gradient of 19.2 to 34.2°C. The results indicate that the casque is capable of dissipating a disproportionate amount of heat in relation to the rest of its body and even comparable to major thermal windows in other animals.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
