Need help with duck eggs

[VirulentVulpine]

Hey everyone, my first time incubating call duck eggs. They’re 21 days old (set March 18th) but don’t look nearly ready to hatch yet to me. My chicken eggs are all looking like the embryo has filled up far more of the eggs. I can still see plenty of thick veins, but something just doesn’t seem right.

Are these still developing?

 

[BullChick]

Ducks need another week.

 

[MGG]

Calls usually hatch in the 25-28 day range. They aren't ready yet, which would be why they don't look ready. You can lock them down with your other eggs, but don't expect any for at least 3 more days