Just as the snake or dragon is the chthonic numen of the tree, so the stork is its spiritual principle and thus a symbol of the Anthropos.
Jung establishes the alchemical stork as the spiritual counterpart to the serpent at the tree’s root, identifying it definitively with the Anthropos and tracing its lineage from Haggadic piety to Teutonic soul-bringing mythology.
, Alchemical Studies, 1967thesis