Once the crow had beautiful silver or snowy white feathers and could speak to humans. The crow was a very special bird for the god Apollo. When Apollo's lover Coronis was pregnant, Apollo told the raven to watch over her. Coronis slowly lost interest in Apollo and was attracted to a human. The crow had been spying on her secretly. He told Apollo that Coronis had a new lover. Apollo was so angry that he turned the loyal raven's feathers black and took away the bird's ability to speak. Coronis was killed by Apollo's twin sister Artemis. The child of Coronis and Apollo lived. He then became Asclepius, the god of medicine and healing.