The SCREECH OWL is the best known of this family. He is found, under slightly different forms, all over our country. In Florida he is smaller and darker than in the Middle States. In California he is larger and grayer, and in the Rocky Mountains somewhat lighter. But he acts in about the same way, wherever he lives. In the East the screech owl is found in two colors. Some have reddish feathers, others have gray. The wise men have not yet found any reason for this difference. The screech owl is badly named, for his song is not a screech. It is a sort of trembling sound, and in some places he is called the "shivering owl," which is a much better name for him than screech owl. If one does not know who makes it, it is rather a weird song in the dark; but if one knows the pretty gray bird, it is sweet and pleasing. The bird comes out before it is quite pitch dark. He may often be seen against the sky, standing on a branch, bowing and swaying back and forth, while he utters strange notes of many kinds. He has plenty to say for himself. But you must keep as still as a mouse if you want to see him. If he can see to catch a mouse in the dark, you may be sure he can see you. Generally the screech owl makes a nest in a hollow tree or a deserted woodpecker nest, and comes out only at night. What he likes best to eat is mice, and mice too come out at night. The way he eats is curious, as I told you in "The First Book of Birds." A few years ago a screech owl went through a broken window into the attic of a house in New Jersey, and lived there all winter. The family were bird-lovers, so they let her stay. She liked it so well that the next spring she made her nest there and hatched out three little owls. The little ones were not at all afraid of people, and a son of the family made many photographs of them. After the owlets were grown, the whole family disappeared, and lived out of doors the rest of the summer. But when cold weather came, the old birds came back and stayed all winter again. They have made their home in that attic, and reared a brood every spring since. They are always very social among themselves. They talk and sing, and make many sorts of noises. One of the queerest of the owl family is the little BURROWING OWL of the West. The Florida Burrowing Owl, found in Florida, differs only a little from the Western bird. The burrowing owl is a comical-looking fellow, only about as large as a robin. He has very long legs for an owl, and is dressed in grayish brown. This bird is said to have very polite manners. In some places he is called the "how-do-you-do owl." He is always bowing, and turning from side to side, and seems to be greeting you as you come near him. The burrowing owl likes a comfortable home underground, out of the way of enemies. In the West, where he lives, prairie dogs are plentiful, and they are always digging out passages and rooms, more than they can use. So the owl has no trouble in finding empty quarters to live in.