What do I call this duckling?

[Bolfreak]

No, like Chickens, the SPECIES is duck which is divided into breeds. Just like chickens, you can work to introduce traits into breeds they don't originate from, but they are still seperate breeds

I don’t think that’s accurate here. You have Mallard based and Muscovy, same species, different breeds. Interbreeding isn’t important to color varieties because the offspring are sterile.
By this logic Buff ducks would be three separate breeds and they’re not. Buff plus Buff gives any of three varieties of a Buff duck even though they’re different colors.
And that’s just the yellow Buffs. There were Blue Buffs and other colors that Orpington was developing which makes sense when you see the color genes at work.

 

[JacinLarkwell]

I don’t think that’s accurate here. You have Mallard based and Muscovy, same species, different breeds. Interbreeding isn’t important to color varieties because the offspring are sterile.
By this logic Buff ducks would be three separate breeds and they’re not. Buff plus Buff gives any of three varieties of a Buff duck even though they’re different colors.
And that’s just the yellow Buffs. There were Blue Buffs and other colors that Orpington was developing which makes sense when you see the color genes at work.

Muscovy and mallard aren't the same species. If they were, they would produce fertile offspring, and they don't.

Varieties and breed aren't the same thing. Just like chickens, you can have the breed (Buff ducks, Swedish ducks, leghorn chickens, ect) and have several colors recognized in that breed.

In the standard of perfection, ducks are clearly seperated into breeds, just like chickens and geese, but unlike turkeys which are all considered the same breed and different varieties

 

[Bolfreak]

Thanks for making my point, you didn’t have to be a troll to get there.
If I have liver spot Dalmatians it’s same species, same breed as black spot so I’d call it a Variety. It’s not a separate breed. The terms are interchangeable and in this case to me not important. In my original post I specified I wanted specific colors (sex linked also a plus) of a duck that wasn’t Runner, Ancona or Swedish because of the body types and bib in Swedish case. They’re all still just ducks.
I also have turkeys and get different colored Varieties from my Breed: Turkeys. But I’m not a troll when someone asks me what breed they are.

 

[JacinLarkwell]

Thanks for making my point, you didn’t have to be a troll to get there.
If I have liver spot Dalmatians it’s same species, same breed as black spot so I’d call it a Variety. It’s not a separate breed. The terms are interchangeable and in this case to me not important. In my original post I specified I wanted specific colors (sex linked also a plus) of a duck that wasn’t Runner, Ancona or Swedish because of the body types and bib in Swedish case. They’re all still just ducks.
I also have turkeys and get different colored Varieties from my Breed: Turkeys. But I’m not a troll when someone asks me what breed they are.

I am not a troll and I never called you one either. You asked what you would call it. It is a blue mixed breed duckling.

 

[Bolfreak]

I am not a troll and I never called you one either. You asked what you would call it. It is a blue mixed breed duckling.

Well, I’ve learned then not to ask for opinions formed out of ignorance.