In a similar manner also, the blackbird, the thrush, and the starling take their departure to neighboring countries; but they do not lose their feathers, nor conceal themselves, as they are often to be seen in places where they seek their food during the winter: hence it is that in winter, more especially, the thrush is so often to be seen in Germany. It is, however, a well-ascertained fact, that the turtle-dove conceals itself, and loses its feathers. The............