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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
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
[Union Label]
23-1020
A Quantitative Study of the Nocturnal
Migration of Birds
By
GEORGE H. LOWERY, JR.
CONTENTS
Page
INTRODUCTION 365
ACKNOWLEDGMENTS 367
PART I. FLIGHT DENSITIES AND THEIR DETERMINATION 370
Lunar Observations of Birds and the Flight Density Concept 370
Observational Procedure and the Processing of Data 390