The book traces the evolution of migration study, from early observations to modern tracking technologies like satellite telemetry. It emphasizes that migration is not just a behavioral trait but a complex interaction of genetics, physiology, and environmental adaptation. Chapters progress from defining migration and exploring physiological adaptations to examining environmental drivers and the impact of human activities. This approach offers a comprehensive overview of the vulnerabilities migratory species face due to habitat loss and climate change, highlighting the urgent need for conservation.