Is this egg fertile???

[Carolineelle07]

A couple of My egg looks exactly like how yours did with the air bubble looking thing inside. I’m assuming that means they are fertile I can’t find that much info on them. Did these eggs ever hatch?

 

[StefAlGeeza]

Here is a duck egg (Mallard) embryo development chart from wildliferehabber.com

Hello there! I had the same issue