UNITED STATES
DEPARTMENT OF AGRICULTURE
CIRCULAR No. 363
Washington, D. C. October 1935
THE MIGRATION
OF NORTH AMERICAN BIRDS
By
FREDERICK C. LINCOLN
Senior Biologist in Charge, Section of Distribution
and Migration of Birds Division of Wildlife Research,
Bureau of Biological Survey
For sale by the Superintendent of Documents, Washington, D. C. Price 10 cents
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CIRCULAR No. 363 OCTOBER 1935 |  |
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THE MIGRATION OF
NORTH AMERICAN BIRDS[1]
By Frederick C. Lincoln, senior biologist, in charge Section of Distribution and Migration of Birds, Division of Wildlife Research, Bureau of Biological Survey
[1] This circular supersedes Department Bulletin 185, Bird Migration, by Wells W. Cooke, published in 1915. In addition to his own original investigations in the field and those reflected in the files of the Biological Survey, the author has made free use of the writings of Professor Cooke, Alexander Wetmore, William Rowan, A. Landsborough Thomson, H. A. Allard, and others. To all these grateful acknowledgment is made, particularly to Doctor Wetmore, Assistant Secretary of the Smithsonian Institution, who has read the entire manuscript and made many valuable comments and suggestions.