Oh boy this is just one of the reasons that I like your photographs so much. You show us wildlife that I didn't even know existed. I love the black eye stripe and the flash of blue on the wings of this duck. With a yellow bill and orange feet it's a really attractive bird.
Another marvelous photo, introducing a very attractive duck! I've never seen a Black Duck before. I'll have to consult my bird books to see if we have them in this area.