ترجمة - انجليزي-فرنسي - Dark Prince of Cold Blood. Raven. Cross....

Please.. I have to know the diference between "Raven" and "Crow".
I know that they both are black birds, but I must discover the difference between then.
Thanks a lot.

Le corbeau(lat. corvus) et la corneille(lat. cornicula) se ressemblent, mais le corbeau est plus gros. (raven is bigger than crow, they belong to the same species)