On top of the Rock Quarry.
Combs pond just across the fence on top of the hill. I walked up here yesterday.
I saw these ducks. In all the pictures, the ones on the lower left here stayed in this one place at the edge of the pond and the others swam all around. The were too far off to tell what kind of ducks they were.
With the zoom on the camera, I can see the two in the corner are our ordinary Mallard ducks.
The others are all Bufflehead Ducks, according to google
You can see the male and female pair on the right here.
and here.
And all of them again. If you click on the images they will enlarge so that you can really see why they are called buffleheads.