I have no pedigree tests and have no interest for now. So from the beginning I asked about the color of ducks if there is some variety with this standard, and what would be. Anyway they are all the same species, and we are in genetics topic so we can talk about mutations without the need of...
The species is Anas Platyrhynchos, like any other Mallard breed (1). Some people tell me they are Pomeranian Duck, at least the color.
(1) List of 32 Duck breeds http://www.zooenc.eu/en/ducks/
All are mallard, and have the same size of a common mallard. None is hybrid. His brothers some are white and others have wild pattern. This is the photo of the parents of these ducks