These halves are called the _upper mandible_ and the _lower mandible_." "Why, it's just like people's mouths," said Nat, "only people have lips and teeth." "Certainly it is like our mouths.

Birds are built like ourselves in a great many things, and live as we do in a great many ways.

Bird People and House People are animals, and all animals must eat to live.

A bird's beak is its mouth, and the under mandible moves up and down, like our chins when we eat or talk.

Birds can talk as well as sing with their beaks.