Besides telling us the bird's migratory patterns, this information also indicates the bird's physiological changes, enabling scientists, after analysis, to surmise its living habits during the course of migration, which we may otherwise be unable to observe.
由四面八方蒐集來的資料，在綜合、分析後，除了可以瞭解它的遷移方向，還能借著各種測量紀錄，看出它身體的變化，由此推測、分析它在我們見不到的遷移過程中的生態習性。