Why do birds have beaks?
A bird's beak is like a tool that helps the bird eat.
The very first birds had teeth. We think that later birds evolved beaks to help reduce their weight. It is important for a flying creature to be light, and a beak weighs less than a mouth full of teeth.
Each bird has a type of beak that has been modified by evolution to suit the way it eats. For example, some have strong beaks for cracking nuts. Some have beaks like tweezers, which can be used to probe for insects.
Different birds have evolved different beaks to deal with different types of food.
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