Are any of these fertile?

[ACDKMT]

I doubt any of them are but after a year of only 2 being fertile I don't know. They are 14 days since my duck started sitting.

 

[learycow]

Hard to tell, but the clear ones are definitely NOT fertile.

Look at the others in a darker room with the light on them. If you see veining (which could very well be the dark areas, it's just hard to see in the pics you posted) then they are indeed fertile.


From top to bottom my guess is yes, yes, no, yes, no, no, yes

 

[ACDKMT]

Thanks for your input I knew some weren't fertile, the ones that have a dark area literally look like that in person hard to see anything is that normal? Will a dark space be better? Also forgot to mention they're Muscovy eggs

 

[learycow]

Well first off, muscovy eggs take a week longer to incubate so are a little slower growing.

But yes, if they are so dark you can't see through them then chances are they are fertile. If they look clear with a darker spot that blobs and you can move it, that's just the yolk and doesn't mean it's fertile

 

[ACDKMT]

Ok, at what day should I be able to 100% confirm fertility?

 

[learycow]

In Muscovy, day 16-18 for sure

 

[ACDKMT]

Cool, so I let my duck keep the fertile ones but I put one in my homemade incubator any advice for that? Temp is 99°-100°F with minimal flowing air.

 

[learycow]

For the incubator, keep it around 99.5-100.5 degrees.
Humidity should be at 55-60% then increased to 70% for lockdown