How do I find ducks are laying eggs?

[HappyHippyChick]

I have chickens and ducks.I get little eggs and a few look little bigger and a little oblong. I have only had some ducks and I do not know if they are laying eggs. Usually, I could check for the back end on the chickens. But I do not know what the ducks are doing. They do seem maybe4 months or? Mainly the ducks roost high and whenever I go in the coop they are up high. I have never seen them in where the chickens lay. I just do not know how to know. They are Muskovys. Maybe they are 6 months?

 

[GodLovesU]

Can you post pictures of the eggs?

 

[JacinLarkwell]

The shells will be a lot harder to crack