The only noise comes from a bulldozer smoothing the coal-mound and the cawing of rooks .
而唯一的噪音则是推土机铲平煤堆的声音与秃顶乌鸦的哀嚎声。
A breeding ground for gregarious birds ( such as rooks ) .
群居的鸟类的繁殖地,比如秃鼻乌鸦群。
Rooks are found to use ingenious tools ; dolphins are overheard talking to whales ; and pigs , while not yet flying , play a passable game of football-at least according to the bbc .