There is a Carol of the Birds that starts, "Whence comes this rush of wings afar, Following straight the Noel star? Bird of the woods in wondrous flight Bethlehem seek this holy night." "Tell us, ye birds, Why come ye here? Into this stable, poor and drear? Hastening we seek the new-born king, And all our sweetest music bring." Then I think there's a verse about various birds, perhaps not. The word "philomel" (nightingale?) comes to mind. May be spurious. Last verse is "Angels and shepherds, birds of the sky Come where the Son of God doth lie. Christ on Earth with man doth dwell, Join in the shout, Noel! Noel!"

It doesn't sound as if this is the one you wanted, but thought I'd try. - Rita F