At this time they also begin to appear on stream banks and in paddy fields which are not too deeply flooded, shuttling back and forth to scoop up mud or fetch straw. Males and females alike never return to their nests empty-beaked--they always carry back some wet mud or a piece of straw. They throw themselves into the work of nest building with all their energy.
而溪邊、不太多水的水田裡也開始有了燕子，叼土、啄草穿梭不停，雄鳥、雌鳥在巢邊出現時總是嘴裡有物，不是濕泥巴就是小枯草，賣力地築巢，接著下蛋、孵化，然後就是異常忙碌的餵食生活。