duck gender mystery?

[Nool]

I have 3 blue swedish ducks (out of six total ducks) they are supposed to be female they all SOUND like females. but one has an olive green bill and another has a greenish blue bill and they both have sort of green flecks of irridencent feathers on their heads. I read that Drakes have green bills, so are these 2 ducks actually drakes? or should i just believe the sounds they make. (none have curly tail feathers)

 

[DucksAreBest]

I have 3 blue swedish ducks (out of six total ducks) they are supposed to be female they all SOUND like females. but one has an olive green bill and another has a greenish blue bill and they both have sort of green flecks of irridencent feathers on their heads. I read that Drakes have green bills, so are these 2 ducks actually drakes? or should i just believe the sounds they make. (none have curly tail feathers)View attachment 2581024

They are most likely females. Could you post a video of their voice?

 

[fatty and friends]

drakes and hens can have any color beak

 

[Nool]

They are most likely females. Could you post a video of their voice?

https://twitter.com/x/status/1374144670951895040

here they are fighting

 

[DucksAreBest]

https://twitter.com/x/status/1374144670951895040

here they are fighting

They're definitely females.

 

[Nool]

Thanks for all your input. They have been fighting over their favorite boy duck, one even has a bald patch in the front neck area where they grab on to wrestle. when I read about the green bill I was worried that maybe they were actually boys and the fighting was for a too-many-boys reason, which is even a bigger headache.