Corvus, (latin for Raven) is listed in the 48 Constellations listed by the 2nd-century astronomer Ptolemy.
Corvus the Raven was tasked by the Greek god Apollo, to take a chalice and collect the waters of life that Apollo needed for a sacred ceremony he was performing.
Corvus did not attend to his task right away, choosing to spend many days waiting to eat figs about to ripen on a fig tree. When Corvus eventually returned to Apollo with the waters of life, the raven claimed he had been delay by Hydra the water snake. Angry and annoyed, Apollo cursed Corvus with eternal thirst and threw him into the heaven, beside the chalice or cup CRATER, guarded by the watersnake, HYDRA.
This story about the curse of eternal thirst from the Greek perspective is why Ravens have black feathers and raspy voices. Read More