Gandering at the Ducks.

Out shopping a bit today,didn't feel like taking a picture of anything.I passed by a small local loch and these were on the pavement obligingly so that I didn't have to leave the car on this dismal day.
Don't know if the black one with the white throat is rare,but I've not seen one before.
These ducks seemed bigger than the standard ones in the background.
That was lucky!