They're going to be located at the very top of the fat end of the egg (which should be incubated with that end up too, in case you didn't know). I know people all do candling differently, but I've found the most success with using an LED flashlight from the top (fat end) shining down into the egg at a slight angle away from me. That way I can see the air cell well enough to outline and keep tabs on. On the 2nd and 3rd pictures you posted you can see the air cell all the way to the left, on the other side of the dark area. I can't tell very well from your pictures, and I'm used to my method as well, but you should be seeing lots of veins going down the length of the egg at this point and it looks like your air cell might be a little small. If it is, run the bator dry until day 18. Again, it's hard for me to tell. I'm no expert by any means, currently doing my first incubation as well. Also, if you see the veins migrating towards the middle of the egg in a ring, the embryo died. If you see no veins at this point, they were sterile eggs. Hope this helps a bit. Welcome to BYC!!
