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Words: 36018 in 7 pages
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INTRODUCTION 365
ACKNOWLEDGMENTS 367
Lunar Observations of Birds and the Flight Density Concept 370
Observational Procedure and the Processing of Data 390
Horizontal Distribution of Birds on Narrow Fronts 409
Density as a Function of the Hour of the Night 413
Migration in Relation to Topography 424
Geographical Factors and the Continental Density Pattern 432
Migration and Meteorological Conditions 453
CONCLUSIONS 469
LITERATURE CITED 470
LIST OF FIGURES
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