Swifts, on the other hand, almost never touch the ground for their entire lives. From the time they first open their eyes they know how to fly and, except for resting or reproducing in the nest, they spend all their time playing, courting, mating, and catching bugs for meals in the air.
雨燕卻一生幾乎不落地，由襁褓之齡打開眼睛到能夠飛行，除了入巢休息、繁殖，就在廣大的空中遊戲、求偶、交配，捕捉隨著氣流而上的昆蟲為食。