At another time I saw them in yet greater numbers and acting together, as it appeared, in a sort of concert. I was walking, I cannot now recollect why, or to what end, along the marshes on the bank of the Hackensack river, between the railroad bridge and that very singular knoll named Snakehill, which rises abruptly out of the meadows like an island out of the ocean. It was late in the summer evening, the sun had gone quite down, and a thick gray mist covered the broad and gloomy river. On a sudden, I was almost startled by a loud quawk close above my head; and, on looking up, observed a large Bittern wheeling round and round, now soaring up a hundred feet or more, and then suddenly diving, or to speak more accurately, _falling_, plump down, with his legs and wings all relaxed and abroad, precisely as if he had been shot dead, uttering at the moment of each dive a loud _quawk_. While I was still engaged in watching his manœuvres, he was answered, and a second Bittern came floating through the darksome air, and joined his companion. Another and another followed, and within ten or twelve minutes, there must have been from fifteen to twenty of these large birds all gamboling and disporting themselves together, circling round one another in their gyratory flight, and making the night any thing, certainly, but melodious by their clamors. What was the meaning of those strange nocturnal movements I cannot so much as guess; it was not early enough in the spring to be connected in any way with the amatory propensities of the birds, or I should have certainly set it down, like the peculiar flight, the unusual chatter, and the drumming, performed with the quill-feathers, of the American snipe--_Scolopax Wilsonii_--commonly known as the English snipe, during the breeding season, as a preliminary to incubation, nidification, and the reproduction of the species--in a word, as a sort of bird courtship. The season of the year put a stopper on that interpretation, and I can conceive none other than that the _Quawks_ were indulging themselves in an innocent game of romps, preparatory to the more serious and solemn enjoyment of a fish and frog supper. The Bittern, it appears, on the Severn river, emptying into Hudson’s Bay, makes its nest in the long grass of the marshes, and there lays its eggs and rears its black, downy young; but several years ago, while residing at Bangor, in Maine, while on a visit to a neighboring heronry, situated on an island covered with a dense forest of tall pines and hemlocks, I observed a pair of Bitterns flying to and fro, from the tree-tops to the river and back, with fish in their bills, among the herons which were similarly engaged in the same interesting occupation of feeding their young. One of these, the male bird, I shot, for the purpose of settling the fact, and we afterward harried the nest, and obtained two full-grown young birds, almost ready to fly.