How to tell the difference between duck eggs

[wildlifesteph]

I have khaki campbell ducks, two drakes and eight hens. My hens are laying. I also have muscovy ducks, two drakes and eleven hens. I don't quite know if any of my muscovy hens are laying as all the eggs seem to look pretty much the same. I have been getting about five duck eggs each day that I assume are from my khakis. Does anyone know how to tell the difference between khaki campbell duck eggs and muscovy duck eggs? Can someone also please post photos comparing the two? Also does anyone know when would be the best time to let the muscovy hens go broody?

 

[Amiga]

I wonder if @Going Quackers might be able to help - she has Muscovies and Buffs, and perhaps Calls….

 

[wildlifesteph]

Ok, thank you.