Nearly all these wild animals are pursued by the Indians, and the hunters of the Hudson's Bay Company,[196] for their skins; they are consequently growing rarer, and their haunts become more remote each succeeding year: probably, at no distant time, they will be altogether extinct. The birds of Canada differ little from those of the same names in Europe, but the severe climate is generally uncongenial to them. There are eagles, vultures, hawks, falcons, kites, owls, ravens, crows, rooks, jays, magpies, daws, cuckoos, woodpeckers, hoopers, creepers, humming-birds, thrushes, blackbirds, linnets, finches, sparrows, fly-catchers, pigeons, turkeys, ducks, geese, swans, grouse, ptarmigans, snipes, quails, and many others. The plumage of the American birds is very brilliant; but the sweet voices that fill the European woods with melody are never heard. Many of the birds of Lower Canada are migratory; the water-fowl seek the cooler north during the heat of summer, and other species fly to the south to shun the wintery frosts. In the milder latitudes of Upper Canada, birds are more numerous. They are known by the same names as those of corresponding species in England, but differ from them to some extent in plumage and character. In Lower Canada the reptiles are few and innocuous, and even these are not met with in the cultivated parts of the country. In the Upper Province, however, they are more numerous; some species are very dangerous, others harmless and exquisitely beautiful. Two kinds of rattlesnakes[197] are found here: one of a deep brown and yellow color, and seldom more than thirty inches in length; it frequents marshes and low meadows, and is very dangerous to cattle, often fastening its fangs upon their lips while grazing. The other is a bright greenish yellow clouded with brown, and twice the size of the former. These reptiles are thicker in proportion to their length than any others; the rattle is at the end of the tail, and consists of a number of dry, horny shells inclosed within each other. When wounded or enraged, the skin of the rattlesnake assumes a variety of beautiful colors; the flesh is white as that of the most delicate fish, and is esteemed a great luxury by the Indians. Cold weather weakens or destroys their poisonous qualities. In the spring, when they issue from their place of winter concealment, they are harmless till they have got to water, and at that time emit a sickening smell so as to injure those who hunt them. In some of the remoter districts they are still numerous, but in the long-settled parts of the country they are now rarely or never seen.