i was gonna say the one in the back looked like a swedish buff mix or a swedish khaki mix. looking at it again, it kinda looks like the front could be buff swedish. mostly buff. you can see a little blue in there and all. hmmm. theyre pretty though! whatever they are!
The face and bill are so small.. Id say either Blue swede x Mallard or Blue swede cross buff.
I say mallard because of the half ring around the neck , and my mallard x buff ducks come out blue fawn. Maybe someone on here who knows about genetics can help out.