The cuckoo then on every tree, Mocks married men, for thus sings he, Cuckoo! Cuckoo! Cuckoo! O word of fear, Unpleasing sound to the married ear. Shakespeare.Loves Labours Lost, Act V. Scene 2. (A song at the end of the Act.)
The finch, the sparrow, and the lark, The plain-song cuckoo gray, Whose note full many a man doth mark, And dares not answer nay. Shakespeare.Midsummer Nights Dream, Act III. Scene 1. (Bottom, singing.)