Old enough to sex these 2 Muscovy ducks?

[KikiDeAnime]

I got these two little ones a few weeks ago from a lady and I got them understanding that either one or both could be males. I'm getting 2 females from the lady very soon and I don't allow inbreeding of any kind here so I need to know who is getting separated once the females arrive.
The adult female you see in the video will be going with the male in a separate pen.
Also excuse the crazy duck(s) quacking in the background, I just fed everyone so they're just expecting more than they need.
Thank you in advance!
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[KikiDeAnime]

@Canadian Wind

 

[Canadian Wind]

The blue looks male, and the black pied may be female?

Are you able to take pictures of them, it's a bit difficult to see. Preferably with them together.

@Miss Lydia

 

[KikiDeAnime]

The blue looks male, and the black pied may be female?

Are you able to take pictures of them, it's a bit difficult to see. Preferably with them together.

@Miss Lydia

I can try.
I'll have to get them after work today

 

[Canadian Wind]

Here, this may help you, too:

https://www.raising-ducks.com/determining-muscovy-gender/

 

[KikiDeAnime]

 

[KikiDeAnime]

@Canadian Wind

 

[Canadian Wind]

Still thinking blue is a boy, and still on the fence about the black but leaning female.

 

[KikiDeAnime]

Still thinking blue is a boy, and still on the fence about the black but leaning female.

That's what I've been thinking but I will post more photos in a few weeks just in case

 

[KikiDeAnime]

Still thinking blue is a boy, and still on the fence about the black but leaning female.

Is the tail thing accurate?