The Bird Study Book has been written for the consideration of that ever-increasing class of Americans who are interested in acquiring a greater familiarity with the habits and activities of wild birds. There are many valuable publications treating more or less exhaustively of the classification of birds, as well as of form, colour, distribution, migration, songs, and foods. Here an attempt is made to place before the reader a brief consideration of these and many similar topics, and suggest lines of action and thought that may perhaps stimulate a fuller study of the subject.