[Cover]




[Pg_361]
A Quantitative Study of the Nocturnal
Migration of Birds

BY

GEORGE H. LOWERY, JR.








University of Kansas Publications
Museum of Natural History

Volume 3, No. 2, pp. 361-472, 47 figures in text
June 29, 1951








University of Kansas
LAWRENCE
1951




[Pg_362]
UNIVERSITY OF KANSAS PUBLICATIONS, MUSEUM OF NATURAL HISTORY

Editors: E. Raymond Hall, Chairman; A. Byron Leonard,
Edward H. Taylor, Robert W. Wilson








UNIVERSITY OF KANSAS
Lawrence, Kansas








PRINTED BY
FERD VOILAND, JR., STATE PRINTER
TOPEKA, KANSAS
1951

Look for the Union Label

23-1020




[Pg_363]




A Quantitative Study of the Nocturnal Migration of Birds

By

GEORGE H. LOWERY, JR.


CONTENTS

 Page
Introduction365
Acknowledgments367
Part i. Flight Densities and Their Determination370
    Lunar Observations of Birds and the Flight Density Concept370
    Observational Procedure and the Processing of Data390
Part ii. The Nature of Nocturnal Migration408
    Horizontal Distribution of Birds on Narrow Fronts409
    Density as a Function of the Hour of the Night413
    Migration in Relation to Topography424
    Geographical Factors and t                        
...
                        
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