I have not addressed an imaginary audience, nor have I given my prospective readers what, theoretically, I thought they ought to have, but what personal experience with students of birds has led me to believe would meet their wants.

The preparation of this work has firmly convinced me that the poet would have been nearer the truth had he written One touch of nature makes the whole world kind. In the succeeding pages I have attempted to express my appreciation of the assistance which natural ist friends and associates have generously given me, but here I desire to especially thank Miss Florence A. Merriam, Dr. J. A. Allen, and Mr. Ernest E. Thompson for much valuable criticism and advice.

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