Well, my ducks have been laying and I didn't notice, haha!
They share their coop and run with a few chickens, some of whom are EE pullets. I'd been confused about not getting Aztec eggs, because it seemed like everyone else was. And all the rest of my birds were laying, so it was odd.
Today as I was collecting eggs the thought suddenly occurred to me that I was getting an awful lot of green eggs for the number of EEs I had.
Yep, the ducks were sharing nest boxes with the EEs. The eggs are so similar in color and size that I really didn't notice until I thought about it. I actually had to shine a light through some of them to determine which were duck and which were chicken.