Is it true its 50/50 percent for Duck eggs to survive during incubation?

[IrisJade]

I had no idea incubating duck eggs was so difficult

 

[nuthatched]

Can you explain?
Are these shipped eggs? Local?
What breed of duck?
What incubator do you have and did you calibrate it?
What temperatures and humidity are you running?

 

[IrisJade]

Shipped eggs, Indian runner.

 

[nuthatched]

Shipped eggs, Indian runner.

Shipped eggs are always a gamble, they get shook up.
Can you answer any of the othe questions?