Bird or Beast?

Lyrics

Did any bird come flying          After Adam and Eve, When the door was shut against them          And they sat down to grieve? I think not Eve's peacock          Splendid to see, And I think not Adam's eagle;          But a dove may be. Did any beast come pushing          Through the thorny hedge Into the thorny, thistly world          Out from Eden's edge? I think not a lion,          Though his strength is such; But an innocent loving lamb          May have done as much. If the dove preached from her bough         And the lamb from his sod, The lamb and the dove          Were preachers sent from God.