谁能用英语回答这个脑筋急转弯的问题呢why do birds fly south in the winter

谁能用英语回答这个脑筋急转弯的问题呢why do birds fly south in the winter 脑筋急转弯 Why do birds fly south? 脑筋急转弯：1.Why do birds fly to south?2.There is four mistake in why do birds south in the winter? Why do birds fly south for winter why do brids fly south in the winter? riddle:why do birds fly south for winter In winter ,some birds fly to the south 为什么要用fly啊. what in the winter do not fly south? In winter ( ) do not fly south 英语翻译1.Why do birds fly to south?2.There is four mistake in t 英语脑筋急转弯:Why does time fly?(时间为何飞逝)