The cuckoo is a "full-time" chirper, so in the small hours of a cool spring night, when all the mountains are quiet, it may still be heard singing alone to the moon, in a desolate voice which makes travelers think of returning home.
杜鵑這「全職型」啁啾的鳥類，常常春寒四嶺靜，就它獨叫三更月。鳴聲淒厲，遂時時牽動旅客思歸。