What is the difference between a beak and a bill?

What is the difference between a beak and a bill?

A beak and a bill – mostly in birds – is used for eating. There are two parts of a beak and a bill: 1) upper mandible (jaw), which is also called a maxilla, and 2) lower mandible (jaw), which is called mandible. 

The beak and the bill are similar and it is considered acceptable to use the beak and the bill to mean the same thing. However, there is slight difference.

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African Grey Hornbill

The African Grey Hornbill (Tockus nasutus) is a large big-beaked African bird.

The African Grey Hornbill has a grey-brown body with a long white stripe from its eye to the back of its neck (nape), and another white stripe down the centre of its back. It has brown wings edged in white. Its throat and chest are pale grey-brown, and its belly is white.

The male has a large downward curved black beak with a cream patch on its maxilla (upper beak), and narrow pale lines on its mandible (bottom beak). The female has a large black beak with a dark red beak tip, and half of the maxilla (upper beak) is a cream-yellow colour.

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