White(not yellow) muscovy ducklings?

[SolarDuck]

I was just browsing YouTube and a video came up in my recommended, here is the video

In the video it shows Muscovy ducklings that are yellow, but also ones that are completely snow white! I did not know that this was possible for Muscovys or any ducklings for that matter. Are they albino? Is this normal? They are like the most adorable ducklings I've ever seen.
I searched google for other pictures of white ducklings and was unable to find a single one.

 

[casportpony]

I have seen that once before.

 

[sourland]

Neat ! I have never seen that.