Avian migration is one of the most remarkable phenomena in the natural world, involving complex physiological transformations and sophisticated behavioral strategies. This presentation explores how birds prepare for and execute long-distance migrations, focusing on the internal and external changes that make these journeys possible.

We will examine the physiological adaptations that occur prior to departure, including hyperphagia (increased feeding behavior), rapid fat accumulation for energy storage, muscle remodeling, hormonal shifts, and changes in metabolic rate. Special attention will be given to how fat retention functions as the primary fuel source during sustained flight, and how certain organs temporarily adjust in size to optimize energy efficiency.

In addition to internal transformations, this presentation covers key behavioral adaptations such as migratory restlessness (zugunruhe), flock formation, route selection, and timing mechanisms influenced by photoperiod and climate cues. We will also explore navigation strategies, including the use of celestial cues, geomagnetic field detection, polarized light patterns, and landmark recognition.

Through case examples such as the bar-tailed godwit (Limosa lapponica) and the Arctic tern (Sterna paradisaea), we will illustrate the extraordinary endurance and precision of migratory species. By integrating physiology and behavior, this presentation provides a comprehensive understanding of how birds successfully travel thousands of miles between breeding and wintering grounds.