Last week, I saw a couple of ducks swimming in the creek a couple times. When they realize I'm there, they just let themselves drift downstream away from me. I could see a male and a female, and downstream another male. They are mallards with the green head.
Here's a video from a couple years ago of ducks like these (or the same ducks?) in the back yard.
It's kind of a thrill to see those wild birds up close.