A Quantitative Study of the Nocturnal Migration of Birds

Name: A Quantitative Study of the Nocturnal Migration of Birds
Author: Jr. George H. Lowery

By Jr. George H. Lowery

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Nature/Gardening/Animals Science - Biology

About This Book

The author develops a quantitative method for studying nocturnal bird migration using telescopic observations of the moon to define a cone of observation and correct raw counts for changing sampling volume. Detailed procedures are given for recording apparent flight paths, identifying coordinates, computing sector densities, and deriving net trend densities, illustrated with figures and field forms. Analyses compare hourly density curves, expose directional sampling biases caused by cone geometry, and assess how topography, geographic position, and meteorological conditions shape local and continental migration patterns. The study synthesizes these elements into conclusions about the temporal variation, spatial distribution, and measurement challenges of nocturnal migration.

About the Author

Jr. George H. Lowery

George H. Lowery Jr. was an American ornithologist known for his contributions to the study of bird migration and avian biodiversity. His notable works include "A Quantitative Study of the Nocturnal Migration of Birds," which explores the patterns and behaviors of birds during their nocturnal flights, and "Additions to the List of the Birds of Louisiana," which expands the understanding of the avian species found in that region. Lowery's research has been influential in the field of ornithology, providing valuable insights into bird behavior and ecology.