I have my ducks, Rouens and Mallards, in separate yard from the chickens but I have two little Araucanas that have always jumped the fence every day and hang out with the ducks all day long. Everyone is 4-5 months old and they all just started laying. First I found a hidden nest in duck house with 4 large white duck eggs and 12 small green eggs which I thought were Araucana eggs. I also found one huge green egg that had a double yolk and double air sac and I started a thread "Twins" - it didn't turn out to be fertile so I eventually tossed it out. A couple of days ago I check and there's another nest, this time 6 large white duck eggs and 6 LARGE green eggs. I'm thinking no way they can be from little Araucana who also has started hanging out in chicken coop to lay but didn't think ducks laid green eggs. I knew the Rouens did not because I hatched them myself and they came from white eggs. BUT...these were obviously duck eggs because they have that waxy translucent type of shell. I do some online research and find that Mallards lay green eggs. O.K. I'm getting more confused because I only have 4 females, 1 definite Rouen and the other 3 I thought were Mallards though it might be I have 2 of each. In any event how can 4 ducks lay almost two dozen eggs in just a few days? I took 12 out of the nest and left probably another 8. I put them in bator and am waiting to see if they are fertile. Then I go and look at remaining 4 small green eggs that went in bator when I first found them, that are developing and they too are duck eggs - the shell and color is consistent they are just very small. Now I have a broody duck sitting on the nest in duck house and I don't know how many more eggs they have laid since I took them out of nest. I do know there are a few RIR eggs in nest and some duck eggs that were in very bottom practially buried that have been there for a long time. I guess it's going to be interesting to see what hatches and if she will care for baby chicks. Hopefully I get some baby ducks from her and can add the baby ducks I'll get from my bator. In any event, if Mallards don't lay green eggs, I'm really confused and still don't know how they are laying so many. Plus now I don't know which green eggs in my bator are duck eggs and which are EE or Araucana eggs so I don't know if they will hatch at 21 days or 28 days. I'm so confused. I have a duck setting on a mixed nest of eggs and I have a bator full of mixed eggs and don't know which are which. Mallards do lay green eggs right? I only found one article that mentioned that. If not, boy am I REALLY confused.