e to
hear it, though I can't write it now."

The Wood Pewee

Length six and a half inches. Wings much longer than the tail, and feet
very small.

Upper parts dark brown with an olive shade, and light bars on the wings;
top of the head not darker than the back, and under side of the beak not
black.

Under parts yellowish-white with a tinge of dark gray along the sides
and across the breast.

Looks very much like the Phoebe, but you can tell them apart if you
attend carefully to the tables.

A Citizen of North America from Florida to Canada and west to the
plains. Travels beyond the United States for the winter.

A good Citizen and shy neighbor. A member of the guild of Sky Sweepers.

CHAPTER XXI

HUMMERS AND CHIMNEY SWEEPS

THE RUBY-THROATED HUMMINGBIRD

[Illustration: Ruby-Throated Hummingbird.]

"It won't be dark for a long time yet," said Dodo, after they had driven
silently for a couple of miles, watching the clouds against the
tree-tops and the Swallows that were out in full force, sky-sweeping for
their evening meal.

"Are you growing sleepy?" asked Olive.

"No, only _terribly hungry_" whispered Dodo, as if rather ashamed of the
fact; "and do you know, Olive, after dinner to-day I told Olaf I never
should be hungry again, because I ate so much chowder. After we had
driven awhile I thought to myself, 'I shan't want supper to-night
anyway.' Then pretty soon I thought, 'I _shall_ want supper,' and now I
want it _right away_!" The Doctor laughed and looked at the cows that
were pasturing in the roadside fields, for they were passing a farming
village.

"I don't see any Cowbirds this afternoon," said Nat, thinking the Doctor
was looking for them.

"This time I am looking at the cows themselves! Those over there are
beautiful creatures, and there is a clear spring of water in the corner
of the pasture. When we come to the farmhouse where they belong, we will
stop to buy some milk, and Miss Dodo shall have supper; for even Mammy's
buns, when they have been travelling about all day in a basket, would,
be rather dry without milk."

"But wouldn't the milk be good if the cows were not pretty, and there
was no spring in the pasture?" asked Nat, who must have a reason for
everything.

"It is not a question of pretty cows; it is whether they are clean and
healthy or not, that makes the milk good or bad. And good pure water to
drink, from a spring that is not near any barnyard or outbuilding, i