Candling duck eggs for first time...what am I looking at?

[Herducks]

I candled my duck eggs today they have been in the incubator for 7 days. I don't know what I am looking at and was hoping someone could help me out!

 

[FireTigeris]

#2 and #4 look like just yolks, often called clears-

#1 looks perfect... #3 is too dark to see well in the picture.


#1 you see the growth plate with the circulatory system started, the neural tube and other fun stuff and the airsac.

 

[Herducks]

So should I toss the clear eggs or give them a few more days? Some look dark all the way through. Are those bad?

 

[FireTigeris]

Just not growing, it's up to you- I do that at day 12 for Ducks

 

[Herducks]

Thank you I will give them a few more days. Maybe a couple are just late bloomers.

 

[Herducks]

I just rceived some eggs in the mail and 2 of them are very liquidy, air bubble moves all around. I am guessing these eggs are no good. My real question is what causes that?

 

[FireTigeris]

they need to wait, rest for three days not in the incubator yet- it's caused by shaking.