Bird migration is the phenomenon where birds travel from one location to another on a seasonal basis. This behavior is driven by factors such as food availability, breeding activities, and climatic conditions. Migration allows birds to take advantage of resources that may not be available year-round in their breeding or wintering grounds, as well as to avoid harsh weather or predators. Researchers study bird migration to better understand the ecological and evolutionary factors that influence this behavior, as well as to track population trends and conservation efforts for migratory bird species. Techniques such as satellite tracking, radar monitoring, and banding have been used to study bird migration patterns and routes.