It is a Madagascar Pochard, a endangered species who disappeared in 1991, and were thought extinct, but then they were found and counted as 27 individuals in 2006, and 14 in 2008, then 82 in 2010 , and they have numbers up to 350 in 2014, and they are continuing to deny extinction! :) I got the...
That is most likely where our differences are coming from, I use Google. I always found Bing or yahoo or Internet explorer unreliable, but hey, they're browsers nonetheless.
When I look up White Breasted Black Duck, this is what I come up with. Also I have no desire to be in an arguement, I simply wished to say several people we're right, it was a Swedish duck, and it came from a BYC post about Swedish ducks.
Still, it doesn't change the fact its a Swedish Duck, and when you look up a White Breasted Black Duck, it does not look anything like the one you posted.
Because your picture looks like a Swedish duck from this post!
https://www.backyardchickens.com/t/578908/my-swedish-ducks-compared-to-the-standard
Third picture down, Black Duck (LaPerouse)
It clearly states they are Swedish Ducks.