Though for the most part living, moving, and feeding together in large companies, the Wild Pigeon mates in pairs for purposes of breeding. They have several broods in the season, and commence nesting very early in the spring, the time being considerably affected by the amount of food. In the spring of 1849 an immense number of these birds collected on Fayston Mountain, near Montpelier, Vt., although at the time of their coming the weather was very cold and the ground covered with snow. There they seemed to find a great abundance of food, berries of the mountain-ash and such other fruit as they could procure, and there they remained, breeding in great numbers, until late in the summer. They were still collected in June, although the whole neighborhood was warring upon them for many miles around, and the markets of Boston and other places were largely supplied with them.
In the extensive forests of Kentucky, Mr. Audubon found them usually collecting and breeding in trees of great height, and always at a convenient distance from water, resorting thither in countless myriads. Their note, during breeding, is described as a short coo-coo, much briefer than in the domestic Pigeon, while their usual call-note is a repetition of the monosyllables kee-kee-kee, the first note being louder and the last fainter than the rest. In the love-season the male puts on the pompous manners peculiar to all Pigeons, and follows the female with drooping wings and expanded tail, the body being held in an elevated attitude and the throat swollen. Occasionally they caress one another in the same manner in which they feed their young, by introducing the bill of one into that of the other and disgorging the contents of their crops.
Their nests are composed of a few dry twigs laid crosswise, and built upon the branches of trees. From fifty to a hundred were seen by Audubon in the same tree, and were said to be frequently at a considerable height. The few I have seen were in low trees, and not more than ten feet from the ground. The eggs are never more than two in number, pure white, and of a broadly elliptical form. During incubation the male bird feeds the mate and afterwards assists in supplying the young birds, and both birds are conspicuous in their demonstrations of affection, both to each other and to their offspring. The young brood, usually both sexes in one nest, leave their parents as soon as they are able to shift for themselves.
In the New England States and in the more cultivated part of the country these birds no longer breed in large communities. The instance near Montpelier, in 1849, is the only marked exception that has come within my knowledge. They now breed in isolated pairs, their nests being scattered through the woods and seldom near one another.
The Wild Pigeon has been successfully kept in aviaries, and has occasionally bred in confinement.
Wilson’s account of the habits of these Pigeons is substantially corroborative of that of Audubon. He witnessed their migrations in vast numbers, in various parts of the country,—in Western New York, in Pennsylvania, in various parts of Virginia, where he beheld their immense flocks with amazement, but where they were mere straggling parties compared with the congregated millions he saw in Ohio, Indiana, and Kentucky. He also noted their habit of frequenting the same roosting-place night after night, even when they were compelled to fly sixty or eighty miles each day to their feeding-places. His account of their roosting-places is similar to that of Audubon, corroborating the accumulation of the dung covering the surface of the ground and destroying all the grass and underbrush, the breaking down of large limbs, and even of small trees, by the weight of the birds clustering one above another, and the trees themselves at last killed as completely as if girdled by an axe.
One of the breeding-places visited by Wilson, not far from Shelbyville, Ky., stretched through the forest in nearly a north and south direction. This was several miles in breadth, and upwards of forty miles in extent. In this immense tract nearly every tree was furnished with nests wherever there were branches to accommodate them. He was informed by those who had sought to plunder the nests of the squabs, that the noise in the woods was so great as to terrify their horses, and that it was difficult for one person to hear another speak. The ground was strewed with broken limbs, eggs, and young Pigeons. Hawks were sailing about in great numbers, while from twenty feet upwards to the tops of the trees there was a perpetual tumult of crowding and fluttering multitudes of Pigeons, their wings resounding like thunder, and mingled with the frequent crash of falling trees. In one instance he counted ninety nests in a single tree.
When on his way from Shelbyville to Frankfort, Wilson witnessed an immense flight of these birds, and was astonished at their appearance. They were flying with great steadiness and rapidity in several strata deep and very close together. From right to left, as far as the eye could reach, this vast procession extended its immense breadth, seeming everywhere equally crowded. For more than an hour by the watch he stood and observed this prodigious procession, which, instead of diminishing, seemed rather to increase both in numbers and rapidity. Three hours later, as he was entering Frankfort, the living torrent above his head was as numerous and extended as when first observed. Wilson computed the number of Pigeons in this flight at over two thousand two hundred millions.
The most southern point at which this Pigeon is known to breed, as given by Wilson, was in the Choctaw country, in Mississippi, in latitude 32°.
Mr. Ridgway obtained a single specimen of this species in the West Humboldt Mountains, in September, 1867. It was a young bird, and had been feeding on the berries of a species of Cornus.