The extent of the southward migration of the Gannet, after it has reared its young, is far greater perhaps than has hitherto been supposed. I have frequently seen it on the Gulf of Mexico, in the latter part of autumn and in winter; and a few were met with, in the course of my last expedition, as far as the entrance of the Sabine River into the Bay of Mexico. Being entirely a maritime species, it never proceeds inland, unless forced by violent gales, which have produced a few such instances in Nova Scotia and the State of Maine, as well as the Floridas, where I saw one that had been found dead in the woods two days after a furious hurricane. The greater number of the birds of this species seen in these warm latitudes during winter are young of that or the preceding year. My friend JOHN BACHMAN has informed me that during one of his visits to the Sea Islands off the shores of South Carolina, on the 2d of July 1836, he observed a flock of Gannets of from fifty to an hundred, all of the colouring of the one in my plate, and which was a bird in its first winter plumage. They were seen during several days on and about Cole’s Island, at times on the sands, at others among the rolling breakers. He also mentions having heard Mr GILES, an acquaintance of his, who knows much about birds, say, that in the course of the preceding summer he had seen a pair of Gannets going to, and returning from, a nest in a tree! This is in accordance with the report of Captain NAPOLEON COSTE, who commanded the United States Revenue Cutter, the Campbell, placed at my disposal during my visit to the Texas, and who was Lieutenant as well as Pilot of the Marion. He stated that he had found a breeding place on the coast of Georgia, occupied by a flock of old, and therefore White Gannets, the nests of all of which were placed upon trees. No one can be greatly surprised at these reports, who knows, as I do, that the Brown Gannet, _Sula fusca_, breeds both on trees and on dry elevated sand bars. During winter months I have generally observed single birds at some considerable distance from the shore out at sea, sometimes indeed beyond what mariners call soundings, but rarely young ones, they generally keeping much nearer to the shores, and procuring their food in shallower water.