What kind of duck is this?

On my kayaking adventure to find my loon family, I saw this duck with her 7 ducklings swimming in the shallows of the lake. This was taken at dusk so I've tried to brighten it up a little bit. Do you know what kind of duck this is? I'm at a loss.

Mystery Ducks!

The picture is not as clear as I wanted - but can you please help identify these lovely ducks? I've had no luck so far with my Michigan field guide....Thank you!