Anybody else with Mule duck photos? MULE DUCKS: We raised about 20 mule ducks this year, Rouen drakes on lilac muscovy hens. Most are Black with greenish/purplish heads and backs. Very beautiful, just can't get a good photo. A bunch are blue with different irredescent sheen. I like this one, can't get a good photo, but he looks like he has fish scales.