Which is Which?

So I figured out that my pekin was a drake. And I figured out we have 2 muscovy drakes and 3 hens. But im still stuck on the magpies. We know we have a pair, but the one I suspected was a boy, quacks really loud. But right as of this moment, none of our ducks are making sounds much louder than peep. But after we put them in their pens, the male quacks loud while the female whistles loudly. The male is starting to get these pretty nlueish feathers by his wings like a mallard drake. Am I correct on who is who? We got them in the middle of june at around 2 weeks old.

The male

The female

Ill attempt to get video later