While standing wondering at the extraordinary scene around us, a noise was heard rising above that of the incessant fluttering, which I can only liken to that of the trampling of thousands of horses on a beaten road. This noise at first sounded distant, but it increased rapidly in proximity and power, until it came rolling in upon us, among the tree-tops, like a crash of thunder. The air was suddenly darkened, and the place where we stood as sombre as a dusky twilight. At the same instant, all the pigeons near us, that had been on their nests, appeared to fall out of them, and the space immediately above our heads was at once filled with birds. Chaos itself could hardly have represented greater confusion, or a greater uproar. As for the birds, they now seemed to disregard our presence entirely; possibly they could not see us on account of their own numbers; for they fluttered in between Dus and myself, hitting us with their wings, and at times appearing as if about to bury us in avalanches of pigeons. Each of us caught one at least in our hands, while Chainbearer and the Indian took them in some numbers, letting one prisoner go as another was taken. In a word, we seemed to be in a world of pigeons. This part of the scene may have lasted a minute, when the space around us was suddenly cleared, the birds glancing upward among the branches of the trees, disappearing among the foliage. All this was the effect produced by the return of the female birds, which had been off at a distance, some twenty miles at least, to feed on beechnuts, and which now assumed the places of the males on the nests; the latter taking a flight to get their meal in their turn.
I have since had the curiosity to make a sort of an estimate of the number of the birds that must have come in upon the roost, in that, to us, memorable minute. Such a calculation, as a matter of course, must be very vague, though one may get certain principles by estimating the size of a flock by the known rapidity of the flight, and other similar means; and I remember that Frank Malbone and myself supposed that a million of birds must have come in on that return, and as many departed! As the pigeon is a very voracious bird, the question is apt to present itself, where food is obtained for so many mouths; but, when we remember the vast extent of the American forests, this difficulty is at once met. Admitting that the colony we visited contained many millions of birds, and, counting old and young, I have no doubt it did, there was probably a fruit-bearing tree for each, within an hour's flight from that very spot!