Corvus Mythology
Corvus, the Crow is a sacred bird of Phoebus Apollo in connection with giving prophetic functions. His wings were originally silver but were turned to black when he delivered bad news concerning the unfaithfulness of Cornis to Apollo.
Another story is where the bird is sent for a cup of water and returned to Apollo late, a water snake in its grasp and a lie in its mouth. As punishment Apollo banished the bird to the stars just out of reach of a cup of water, which is guarded by Hydra.