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Habitat in Canada, hybernat in Carolina, though Linnaeus first quotes Edwards 15, pl. 15, where an entirely different bird is described and figured. (Cf. Bangs, l.c.)
The Passenger Pigeon in former times occurred throughout North America in great abundance, from the Atlantic to the great Central Plains, and from the Southern States, where it rarely occurred, north to at least 62° northern latitude. Being a migrant, this bird used to migrate southwards after the breeding season, and to return to their homes in spring, but it also shifted its quarters according to the abundance or scarcity of food, like our Pigeons. Sometimes incredible numbers flocked together. Such stupendous flights have been described independently by Audubon, Wilson and others. In 1813 Audubon says that during his whole journey from Hardensburg to Louisville, fifty-five miles, countless masses of Pigeons continued to pass over, and also did so during the three following days. "At times they flew so low, that multitudes were destroyed, and for many days the entire population seemed to eat nothing else but Pigeons." Where they roosted in millions, the dung soon covered the ground and destroyed the grass and undergrowth, limbs and even small trees broke down from the weight of the birds. "One of the breeding places visited by Wilson, not far from Shelbyville, Kentucky, 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 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."
It is only natural that man took advantage of such vast multitudes, and that they were killed in great numbers, for food, and, maybe, sometimes wantonly destroyed. Yet it is difficult to understand what brought on their total destruction, as their power of flight was great, and their vision remarkably keen. In 1874 Messrs. Baird, Brewer and Ridgway considered them still common birds, though "their abundance in large extents of the country had
