In zoology a "butterfly route" is a set path and direction that butterflies take in certain numbers for purposes including migration, feeding and mating.
「蝶道」在生物學上，指的是蝴蝶以固定的路線、方向，並形成一定數量，飛行經過的路徑，包括遷移、覓食、求偶等多種型態。