lol, sorry! That was totally the one I meant to post. I have that aircell link in my favorites as well and must have been clicking/pasting too fast for my own good. Thanks for posting the right link! ;)
How are the others doing now? So sorry about the one you lost. :(
Your image link is a bit broken, but I got it to work. Looks like that one is trying to pip where that dark spot is, so it may need you to help at least make it a very small breathing hole there in the shell since it doesn't look like it's in the air cell. Here is the link WVduckchick mentioned...
You won't be able to tell much with the embryo so young if you crack it open, but when you're positive it isn't alive of course you can! It's kind of interesting to see what they look like at different stages of development, too. It's when they die later on in incubation that you can sometimes...
Do you have a strong flashlight you could candle them with? That'd be the first step, just to be sure the eggs are still good and the ducklings are alive in there. Do you have an incubator you can stick them into? Or another broody duck/hen you could stick them under? You'll need to do something...
That doesn't sound promising, but I would keep them in the incubator a few more days and candle again. I had one egg last year that I thought had a blood ring up around the air cell, but I am notoriously paranoid and kept it in for a few more days to be sure. When I candled it again there were...
How often are you turning them? Sometimes it's from not enough turning, but sometimes they will just start to develop that way (on one side) and then they even out later on in incubation. Back when I was an Avian Keeper I had one nest box of Orinoco Goose eggs that were all developing only on...
Great news! Good luck with these guys and keep us updated! :)
The ducks are too small in your pic to really see what they could be, but the middle one looks like some domestic hybrid possibly?
Have you candled the eggs to see if they're still alive in there? If your incubator has a fan you typically incubate at 98.5 degrees. If it doesn't have a fan, it's around 101 degrees.
Wild duck eggs all pretty much look the same, just size differences really. Not sure if they can be...