Black Spot on Duck Egg Day 21

[CLovesDucks]

Hi BYC friends!

This is my first hatch and I’m on day 21! I have 9 duck eggs (4 mallards, 5 runner) and they all appear to be moving and progressing as expected. One egg, however, has a peculiar black spot inside. Any thoughts on what this might be (see pic and short video)? I am turning the eggs and have the temperature right at 100 in a still-air incubator. Humidity is about 55%.

 

[ChickNanny13]

No clue but waiting to see what the experienced have to say You got another week or so, are they all looking similar minus the black spot? Wonder if it could be it's eye?

 

[CLovesDucks]

@ChickNanny13 yep! ~28 days for Mallard types! This is my only egg with a “spot”. My video didn’t want to upload, but the little gal or fellow is certainly moving!

 

[ChickNanny13]

If she/he's moving then possible an eye is my guess Waiting to see what others have to say & waiting for that hatch

 

[CLovesDucks]

@ChickNanny13 Thank you! I promise LOTS of adorable baby pictures/vids when these sweet ones hatch. Praying for 100%!

 

[ChickNanny13]

 

[CLovesDucks]

Commenting to bump the thread. Anyone have any ideas?

 

[ChickNanny13]

@WVduckchick @Texas Kiki @casportpony

 

[casportpony]

As long as they are moving I try not to worry.

 

[WVduckchick]

Have you candled the same egg again?
If you are still seeing movement, I wouldn’t worry much about it. Not much you can do about it anyway, except keep a watch on it.
The veining looks great.

By this point, they are starting to develop their down, so with mallards being dark, it could just be an odd angle, and the darkness comes from the body and the dark down. Probably a bit early to be a foot, but maybe? I don’t think it’s anything “wrong”.