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The Avian MigrantThe Biology of Bird Migration$
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John Rappole

Print publication date: 2013

Print ISBN-13: 9780231146784

Published to Columbia Scholarship Online: November 2015

DOI: 10.7312/columbia/9780231146784.001.0001

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Spring Transient Period

Spring Transient Period

(p.171) Chapter 6 Spring Transient Period
The Avian Migrant

John H. Rappole

Columbia University Press

This chapter focuses on the avian migrant's spring transient period, which begins with departure from the wintering area and ends with arrival at the breeding area. The emphasis is on the “reproduction” aspect of the fitness equation rather than the “survival” aspect. This shift in emphasis from survival to reproduction has far-reaching effects on migratory birds' adaptation for movement from nonbreeding to breeding areas. The chapter first considers the bird's preparation for spring departure and goes on to discuss the endogenous factors and distal cues governing the timing of spring departure. It then examines the timing of departure within the spring transient period and within the circadian period, along with the migrant's migratory flight and migration route. It also describes the avian migrants' orientation, navigation, and stopover in spring and concludes by analyzing the impact of climate change on bird migration.

Keywords:   spring transient period, reproduction, migratory birds, spring, circadian period, migratory flight, navigation, stopover, climate change, bird migration

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