For the last two days I have been getting 4 eggs instead of the normal 3 I had been getting. The new egg is either from a Golden 300 hybrid that is just finishing her molt (she laid cream colored eggs before she started molting) or possibly from a Black Swedish I was given. I thought the Swedish was a boy (I had been told it was a he) and he/she has had the barest tip up on the tail feather but its not really truly curled. I was given the Black Swedish with a Buff that just started to lay about 2 weeks ago and they are supposed to be the same age. My guess is that if he was a male then "he" should have his drake feather curled enough now to really see. Whats the chance that the egg is from the Swedish? Do Black Swedish eggs look like this? Any thing else that could cause the surface to be so dark? The new egg is very different then any of my other duck eggs. It is even darker then the picture shows but the its the one on the bottom right. Its a dark grey almost black very thin layer over a white egg shell. You can see the white peeking out in a few spots. It washes up white with a little bit of scrubbing. And it is much smaller then the other eggs I get but that could be because the duck just started laying.