Dove
The Christian symbol of a dove with an olive branch in its beak represents peace and comes from Genesis 8:6 - 12, also John 1:32–34.  The Christian stories came after very similar myths from earlier cultures.The Chaldean myth the Epic of Gilgamesh, Utnapishtim releases a dove and raven to find land; however, the dove merely circles and returns. Only then does Utnapishtim send forth the raven, which does not return, and Utnapishtim concludes the raven has found land.