"his assignation with the doom-laden red-beaked raven"

In Chinese mythology, the world originally had ten suns embodied as ten crows, which rose in the sky one at a time according to a strict rota. When all ten decided to rise at once for a change, the effect was devastating: crops were scorched and the earth laid waste. So the gods sent their greatest archer, Houyi, who shot down nine of the crows, leaving only one to light the world.

Throughout Chinese culture, crows have a negative connotation.