"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. This Sparrow can say 'Peabody,' and some kinds of Parrots can
repeat whole sentences so as to be understood. That is another thing in
which birds' beaks are like our mouths. Now look again--can you see
anything else about the Sparrow's beak?"

"I see a pair of little holes at the root of the upper mandible," said
Rap.

"Well, those are the nostrils!" said the Doctor. "Birds must breathe,
like ourselves, and when the beak is shut they breathe through the
nostrils."

"So do I," said Dodo; and then she pursed up her pretty red lips
tightly, breathing quite hard through her nose. "I do think," she said,
when she had finished this performance, "birds have faces, with all the
things in them that we have--there are the eyes, too, on each side, like
people's eyes, only they look sideways and not in front. But I don't see
their ears. Have birds any ears, Uncle Roy?"

"I can show you this Sparrow's ears. See here," said the Doctor, who had
run the point of his penknife under a little package of feathers on one
side of the back of the Sparrow's head, and lifted them up; "what does