The keel billed toucan is also known as the rainbow billed toucan because of the colorful bill that the keel billed toucan has. The keel billed toucan's bill is one of the most colorful beaks in the bird world, and although it is more a green color than anything else, the keel billed toucan's bill can be a mixture of green, red, yellow and orange in color.
As with other species of toucan, the size of the keel billed toucan's bill does not affect the balance of the bird itself as it's bill is made out of a substance called keratin, which is extremely light but still very strong. Keratin is also the substance that makes up human hair and fingernails and can also be found in the teeth of many different animal species.
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