둥우리를 만들려고 나무가지를 물고 날아 올때 날개가 바위를 스쳤는데, 여러 대에 걸친 새 들의 날개로 바위가 닳아서 15-20cm 정도 파진 것을 보고 "그래 무슨 뜻인지 알았소" 라고 말하며
And where it's landing to bring the twigs to the cliff, its feathers brushes the rock -- and it had cut the rock six to eight inches in. There was a cleft in the rock by the brushing of the feathers of generations of the birds.