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The Rhinoceros Hornbill is actually much bigger than you might expect! They can get up to 3 feet long and weigh upwards of 6 pounds. That bright, prominent golden-yellow horn on the top of its beak is called a casque. It's a hollow structure made up a keratin and acts as a resonating chamber that amplifies the bird's calls.
This beautiful bird is near threatened due to hunting (for food, traditional medicines, and costumes) and habitat loss. They're likely to be endangered in the near future.