The rockers for a bird's cradle are of the branches of the sycamore, or apple or orange trees, or they are of twigs of the elm or cypress, or banana leaves. Any strong, firm twig or branch that will rock and tilt in the breeze, makes a good rocker of the old-fashioned sort. "Rock-a-bye baby on the tree top, When the wind blows the cradle will rock; When the bough breaks the cradle will fall, Down comes baby, cradle and all." But it is a very hard wind that can break one of these rocker boughs or blow a bird's cradle out of its place. Sometimes a crib is blown out of the elbow of a tree, because the nest in the elbow is not fastened by string, as it is in a bough, but is just tucked in between the great branches. Birds are very wise and select their boughs with great care. Lithe, yielding branches are just right for rockers, they will spring and swing so readily. Sometimes a young twig and a strong old twig, joined together, make a pair of bird rockers. A cradle of this kind is very handy for the mother bird. The wind rocks the babies to sleep, and the leaves sing lullaby songs, while the mother blinks away on the nest or goes off in search of food. Sometimes the mother herself sings the babies to sleep, sitting in the cradle with them. Some of the finches twitter a low musical song over their little ones, and we have often found their nests by hearing these soft, sweet notes. One must listen as well as look, to learn these pleasant secrets. Some mother birds do not approve of rockers for their babies. These are very sensible mothers. They make their cradles in the firm, still crotch of a tree, high up among the forked branches, or lower, right in the hollow trunk. Other birds choose the ground or low shrubs. [Illustration: Baltimore Oriole.] Some cradles, like those of the oriole and titmouse, are curtained all around with beautiful lace fibre or lattice work. Other cribs have no curtains at all except drooping leaves and waving grass. Those of us who can afford them have eider-down quilts on our beds. But these are rare and costly, and not many people have them. Birds do not have to think about the cost of anything. There must be downy quilts in every nursery. These crib blankets are always on hand. Sometimes they are soft gray or brown in color, and sometimes they are "crazy quilts." It all depends upon what sort of a breast the mother bird has. At first thought one might fear that such a quilt might be too heavy. You see the old bird fly to the nest and settle quickly down above her young, as if she took her seat right on their frail little backs. She does not take the trouble to explain to you that her feet are below and between the young birds, and that she lifts her feathers gently. She is really a very fluffy "comfortable," soothing and warm, covering the delicate birds, or the still more delicate eggs.