All blue ducklings are male in my flock

[Blatfarm]

I have been breeding muscovies for years and after much experimentation i have produced a line where the males are all a deep solid blue. I was excited enough to get ducks of this unusual colour but to find a possible sex link was even better. No blue females have been produced to date, just b&w, chocolate, and white. Anyone else had any luck with sex linkage?

[suprstakr]

In muscovy genetics it is said ---- cream drake X self blue hen = self-blue drakelets that carry cream and cream ducklets .