The man being carried by the eagle is Etana, thirteenth king of Kish. Etana had no son and prayed daily to Shamash, the sun god, to grant him a child. Shamash directed him to an eagle caught in a pit, where it had been trapped by a serpent, having eaten the young of the snake. Etana freed the eagle who, in gratitude, carried the king on his back to heaven. Upon his arrival in heaven, Etana was brought to the throne of Ishtar, where he begged the goddess for a son, since his queen was barren. She gave him the plant of birth which he had to eat together with his wife. There are gaps in the story, but it seems Etana did eventually have a son. An alternative version of the story informs that the eagle was unequal to the task and plummeted to earth (see Lindemans, "Etana" in Encyclopedia Mythica). For another seal with Etana and the eagle, here in the presence of a hero shooting with bow at ibexes on top of a mountain, see no. 332 in Buchanan, Catalogue of Ancient Near-Eastern Seals in the Ashmolean Museum, I. Cylinder Seals.