All flycatchers are useful and should be carefully protected, says the same well-informed writer. The WOOD PEWEE is another common flycatcher. He is not generally seen about houses like the phœbe, who calls from the peak of the barn. He may be found in the orchard or the edge of the woods. There he will stand on a fence or low branch and sing or call by the hour, every few minutes flying out to catch a passing insect. This bird is in dark colors, with whitish breast and two white wing-bars. His common call is a plaintive, long-drawn-out "pee-u-ee" and sometimes "pee-ay," but he can sing a droll little song. One lady who watched a wood pewee build her nest heard her sing to herself as she worked what sounded like "O-wee-wee-wee." The nest made by this little mother is very pretty. It is most often on a dead limb where a branch starts out, making a broad foundation. For this reason the bird is called in the South, the dead-limb bird. The nests are not all alike. I have seen many closely covered with lichen, and some made of gray moss so thin that the eggs could be seen through it. Whatever it is made of, it is low and flat like a saucer, and so much like the branch it is on that it is not easy to see. Like other bird mothers, the wood pewee is devoted to her nestlings. She will shield them from the rain by sitting close on the nest and making an umbrella of herself. And when the sun comes down very hot on them, she has been seen to perch on the edge of the nest and spread her wings to act as a shade for them. It is pretty to see this bird with her little family when they have left the nest and are being taught to take care of themselves. She makes many sweet little noises which sound like talk, or a sort of whispering. The WESTERN WOOD PEWEE looks like his Eastern brother, but he is a very different bird. His dress is about the same, and he catches his flies in pewee fashion, but his voice is not in the least like that we hear on the Atlantic side of the country. The Eastern wood pewee has a low, sweet voice, of which one cannot get tired. But the bird of the West has loud, harsh notes, so dismal in tone that they are painful to listen to. His song is almost the only really unpleasant bird song I know. The nest of this bird is a rather deep cup saddled on to a large limb. When it is in a cottonwood grove, it is covered with the sticky white cotton from the trees. It is very pretty when fresh, but it soon gets soiled, and then it is not nice to look at or to handle. FOOTNOTE: [19] See Appendix, 18. XXVI THE HUMMING FAMILY (_Trochilidæ_)[20] THIS is an American family, and no country in the world can show a more beautiful one. There are more than four hundred species, and some of them hardly bigger than a bee. All of these birds have brilliant colors that are called metallic. That is, they glitter like metal, and they show different colors when they are turned different ways.