All the notes of the Blue-Bird--his call-notes, his notes of alarm, his chirp, and his song--are equally plaintive, and closely resemble each other. I am not aware that this bird ever utters a harsh note. His voice, which is one of the earliest to be heard in the spring, is associated with the early flowers and with all pleasant vernal influences. When he first arrives, he perches upon the roof of a barn or upon some still leafless tree, and pours forth his few and frequent notes with evident fervor, as if conscious of the delights that await him. These mellow notes are all the sounds he titters for several weeks, seldom chirping, crying, or scolding like other birds. His song is discontinued in the latter part of summer; but his peculiar plaintive call, consisting of a single note pensively modulated, continues all day, until the time of frost. This sound is one of the melodies of summer's decline, and reminds us, like the notes of the green nocturnal grasshopper, of the fall of the leaf, the ripened harvest, and all the melancholy pleasures of autumn. The Blue-Bird builds his nest in hollow trees and posts, and may be encouraged to breed and multiply around our habitations, by erecting boxes for his accommodation. In whatever vicinity we may reside, whether in the clearing or in the heart of the village, if we set up a little bird-house in May, it will certainly be occupied by a Blue-Bird, unless preoccupied by a bird of some other species. There is commonly so great a demand for such accommodations among the feathered tribes, that it is not unusual to see birds of several different species contending for the possession of one box. After the middle of August, as a new race of winged creatures awake into life, the birds, who sing of the seed-time, the flowers, and of the early summer harvests, give place to the inferior band of insect-musicians. The reed and the pipe are laid aside, and myriads of little performers have taken up the harp and the lute, and make the air resound with the clash and din of their various instruments. An anthem of rejoicing swells up from myriads of unseen harpists, who heed not the fate that awaits them, but make themselves merry in every place that is visited by sunshine or the south-wind. The golden-rod sways its beautiful nodding plumes in the borders of the fields and by the rustic roadsides; the purple gerardia is bright in the wet meadows, and the scarlet lobelia in the channels of the sunken streamlets. But the birds heed them not; for these are not the wreaths that decorate the halls of their festivities. Since the rose and the lily have faded, they have ceased to be tuneful; some, like the Bobolink, assemble in small companies, and with a melancholy chirp seem to mourn over some sad accident that has befallen them; others still congregate about their usual resorts, and seem almost like strangers in the land.