![By the Horns of Trioceros, the Casque of Calumma, the Brood of Bradypodion--Chameleons, Part 2 - Scientific American Blog Network By the Horns of Trioceros, the Casque of Calumma, the Brood of Bradypodion--Chameleons, Part 2 - Scientific American Blog Network](https://static.scientificamerican.com/blogs/cache/file/5D926B28-52CE-4AD5-B05DBE44FE574E35_source.jpg?w=590&h=800&809FAFDD-A48B-43BF-94CD2F80221FC9FC)
By the Horns of Trioceros, the Casque of Calumma, the Brood of Bradypodion--Chameleons, Part 2 - Scientific American Blog Network
![Trumpeter hornbill (Ceratogymna bucinator) showing the large curved casque of horn on top of its bill. The horn is slightly smaller in females than in Stock Photo - Alamy Trumpeter hornbill (Ceratogymna bucinator) showing the large curved casque of horn on top of its bill. The horn is slightly smaller in females than in Stock Photo - Alamy](https://c8.alamy.com/comp/2ADP8G9/trumpeter-hornbill-ceratogymna-bucinator-showing-the-large-curved-casque-of-horn-on-top-of-its-bill-the-horn-is-slightly-smaller-in-females-than-in-2ADP8G9.jpg)
Trumpeter hornbill (Ceratogymna bucinator) showing the large curved casque of horn on top of its bill. The horn is slightly smaller in females than in Stock Photo - Alamy
![Cool Knight Equipment Motorcycle Full Helmet Bat Horn Uchoose Off-road Scooter Personality Helmet Casque Demon Horns Eyecatching - AliExpress Cool Knight Equipment Motorcycle Full Helmet Bat Horn Uchoose Off-road Scooter Personality Helmet Casque Demon Horns Eyecatching - AliExpress](https://ae01.alicdn.com/kf/S2487ac16f0b64787beec2c24e2ef2e2fP.jpg_640x640Q90.jpg_.webp)
Cool Knight Equipment Motorcycle Full Helmet Bat Horn Uchoose Off-road Scooter Personality Helmet Casque Demon Horns Eyecatching - AliExpress
SABAH, Malaysian Borneo - Do you know why the Rhinoceros Hornbill has a golden-yellow horn called casque on top of its beak? The casque which is made up of keratin acts as
Discovery on Instagram: "#DidYouKnow the "horn" of the Rhinoceros Hornbill is called a casque! Hollow and made of keratin, it amplifies the bird's calls. #Birds #ColorInNature"
Zoo Negara Malaysia - . “I am the majestic Rhino of the sky. Awe to my glorious horn!” Rhinoceros hornbills' casque is made of keratin and is hollow inside. It is believed
![Bat Horn Uchoose Motorcycle Full Helmet Off-road Scooter Personality Helmet Casque Demon Horns Eyecatching Cool Knight Equipment - AliExpress Bat Horn Uchoose Motorcycle Full Helmet Off-road Scooter Personality Helmet Casque Demon Horns Eyecatching Cool Knight Equipment - AliExpress](https://ae01.alicdn.com/kf/S6ead1ec0aafd4287b3cfac8d132bb31bp/Bat-Horn-Uchoose-Motorcycle-Full-Helmet-Off-road-Scooter-Personality-Helmet-Casque-Demon-Horns-Eyecatching-Cool.jpg)
Bat Horn Uchoose Motorcycle Full Helmet Off-road Scooter Personality Helmet Casque Demon Horns Eyecatching Cool Knight Equipment - AliExpress
![The Horn or Casque Moth is unusual in that their larvae has a specialised diet of Keratin. They lay their eggs on the horns of recently dead bovids Stock Photo - Alamy The Horn or Casque Moth is unusual in that their larvae has a specialised diet of Keratin. They lay their eggs on the horns of recently dead bovids Stock Photo - Alamy](https://c8.alamy.com/zooms/6/ac7be45ee4634a63bed3cb3c62a84931/w3kj1h.jpg)
The Horn or Casque Moth is unusual in that their larvae has a specialised diet of Keratin. They lay their eggs on the horns of recently dead bovids Stock Photo - Alamy
![Carnegie Museum of Natural History on X: "This species' colorful “horn” is called a casque, and acts like a megaphone to amplify the male bird's call. "馬來犀鳥 Rhinoceros Hornbill" by Hiyashi Haka Carnegie Museum of Natural History on X: "This species' colorful “horn” is called a casque, and acts like a megaphone to amplify the male bird's call. "馬來犀鳥 Rhinoceros Hornbill" by Hiyashi Haka](https://pbs.twimg.com/media/FYhIBrgXwAEvQky.jpg)