The "Trumpeter" is different from either. He is the largest, being frequently met with of nearly six feet in length, while the common swan rarely exceeds five. The bill of the Trumpeter is not tuberculated; and the yellow patch under the eye is wanting. The bill, legs, and feet are entirely black. All the rest is white, with the exception of the head, which is usually tinged with chestnut or red-brown. When young, he is of a greyish-white, with a yellow mixture, and the head of deeper red-brown. His tail feathers are twenty-four in number; but there is a material difference between him and his congeners in the arrangement of the windpipe. In the Trumpeter this enters a protuberance that stands out on the dorsal aspect of the sternum, which is wanting in both the other kinds. It may be that this arrangement has something to do with his peculiar note, which differs altogether from that of the others. It is much fuller and louder, and at a distance bears a considerable resemblance to the trumpet or French horn. Hence the trivial name by which this species is known to the hunters. All the American swans are migratory--that is, they pass from north to south, every autumn, and back again from south to north in the beginning of spring. The period of their migration is different with the three species. The Trumpeter is the earliest, preceding all other birds, with the exception of the eagles. The _Cygnus Americanus_ comes next; and, lastly, the small swans, that are among the very latest of migratory birds. The Trumpeters seek the north at the breaking up of the ice. Sometimes they arrive at a point in their journey where this has not taken place. In such cases they fly back again until they reach some river or lake from which the ice has disappeared, where they remain a few days, and wait the opening of the waters farther north. When they are thus retarded and sent back, it is always in consequence of some unusual and unseasonable weather. The swans go northward to breed. Why they do so is a mystery. Perhaps they feel more secure in the inhospitable wastes that lie within the Arctic circle. The Trumpeters breed as far south as latitude 61 degrees, but most of them retire within the frigid zone. The small swans do not nest so far south, but pursue their course still onward to the Polar Sea. Here they build immense nests by raising heaps of peat moss, six feet in length by four in width, and two feet high. In the top of these heaps is situated the nest, which consists of a cavity a foot deep, and a foot and a half in diameter. The Trumpeters and American swans build in marshes and the islands of lakes. Where the muskrat (_Fiber zibethicus_) abounds, his dome-shaped dwelling--at that season, of course, deserted--serves often as the breeding-place boll? for the swans and wild geese. On the top of this structure, isolated in the midst of great marshes, these birds are secure from all their enemies--the eagle excepted.