Okay so my ducks will be 6 months on the 18th and then I have 4 younger girls that are 13 weeks this week. They are all Muscovy ducks and the boys started breeding the girls about three weeks ago. They have free range of 2 acres and share the same fenced in yard with my 33 chickens (28 hens and 5 roosters). Okay now that you have the history here is my question for those who keep their chickens and ducks together, how do you tell if you are getting duck or chicken eggs. I have gotten two eggs that are very large compared to my chicken eggs this week. The larger eggs don't feel any different on the outside than my chicken egg and I found it in my chicken coop in one of the nesting boxes, but the ducks do have access to that coop and have been in and out of both that coop and their own every day. The large egg is brown but I primarily have brown eggs layers as well so that's no help. I cooked up one of the super large eggs today and it had one large yolk and the white. I expected it to at least be a double yolker since it was larger than a jumbo egg. So how do you tell the difference when you collect eggs? How do you know if you are getting a duck egg or a really large chicken egg? Here's a picture of the two eggs together for comparison the smaller egg is what I have been getting from my chickens and if weighed is a jumbo egg weight. The larger egg is one of two I have gotten. I do have some older chickens so there is the possibility that I am getting larger eggs from someone as well, but it made me question how I would tell once the ducks start laying.