We have lots of wild turkeys in our area of Concord, CA. Many have some white on the wings, but not as much as yours. Very striking bird! Was it alone? I usually see them in groups.
@Frankie
There is a duck that lives in a park near us in Concord, CA along with many ducks and geese, feral and wild. I think it's a Muscovy Duck, too? It's very friendly, and follows people around hoping for handouts.