Indeed, what would be more interesting than the history of our birds for the last two or three centuries? There can be no doubt that the presence of man has exerted a very marked and friendly influence upon them, since they so multiply in his society. The birds of California, it is said, were mostly silent till after its settlement, and I doubt if the Indians heard the Wood-Thrush as we hear him. Where did the Bobolink disport himself before there were meadows in the North and rice-fields in the South? Was he the same blithe, merry-hearted beau then as now? And the Sparrow, the Lark, and the Goldfinch, birds that seem so indigenous to the open fields and so averse to the woods,--we cannot conceive of their existence in a vast wilderness and without man. Did they grow, like the flowers, when the conditions favorable to their existence were established? But to return. The Bluebird and Song-Sparrow, these universal favorites and firstlings of the spring, come before April, and their names are household words. May is the month of the Swallows and the Orioles. There are many other distinguished arrivals, indeed nine tenths of the birds are here by the last week in May, yet the Swallows and Orioles are the most conspicuous. The bright plumage of the latter seems really like an arrival from the tropics. I see them flash through the blossoming trees, and all the forenoon hear their incessant warbling and wooing. The Swallows dive and chatter about the barn, or squeak and build beneath the eaves; the Partridge drums in the fresh unfolding woods; the long, tender note of the Meadow-Lark comes up from the meadow; and at sunset, from every marsh and pond come the ten thousand voices of the Hylas. May is the transition month, and exists to connect April and June, the root with the flower. With June the cup is full, our hearts are satisfied, there is no more to be desired. The perfection of the season, among other things, has brought the perfection of the song and plumage of the birds. The master artists are all here; and the expectations excited by the Robin and the Song-Sparrow are fully justified. The Thrushes have all come; and I sit down upon the first rock, with hands full of the pink Azalea, to listen. With me, the Cuckoo does not arrive till June; and often the Goldfinch, the King-Bird, the Scarlet Tanager delay their coming till then. In the meadows the Bobolink is in all his glory; in the high pastures the Field-Sparrow sings his breezy vesper-hymn; and the woods are unfolding to the music of the Thrushes.