Audiobooks animals Migration of Birds
Migration of Birds

Migration of Birds

by U. S. FISH AND WILDLIFE SERVICE ( - )

Snow Geese which left James Bay, Canada, arrived at the Louisiana Gulf coast "60 hours later after a continuous flight of over 1,700 miles at an average speed of 28 miles per hour." This is just one of the many intriguing facts about bird migration contained in this 1998 circular from the U.S. Fish and Wildlife Service. Informative and up-to-date chapters discuss flight speed and rate of migration, migration routes, and techniques for studying migration. A final chapter, Future Directions, concludes "Migratory pathways evolved over the eons in expectation of a moderately stable environment with sufficient food and cover along appropriate corridors that connected sustaining winter ranges with suitable breeding areas... But human impacts on the environment generate rates of change that exceed many species' ability to adapt." Summary by Sue Anderson.


Early Ideas About Migration

Evolution of Migration

Flight Speed and Rate of Migration

Future Directions

Geographic Patterns of Migration

Influence of Topography

Influence of Weather

Introduction

Migratory Flight Altitude

Orientation and Navigation

Patterns of Migration

Perils of Migration

Preface

Routes of Migration

Segregation During Migration

Stimulus for Migration

Techniques for Studying Migration

When Birds Migrate