Are these really welsh harlequin ducks?

I'd say defiantly not pure WH based on the beak, one of the unique things about them is that they can be sexed by their beaks upon hatching...and upon hatching their beaks are almost always solid with a tiny nib at most. Beak color always seemed pretty solid or gradient, not mottled.

My welsh harlequin ducklings both female (Harleyquinn and Steve, lol) 2/3 weeks old

What are the beaks for females?

Annabel, your two ducks are beautiful

I'm gonna say your ducks are probably welsh harlequin mixes. My duck Snowflake is a mallard/WH mix, and she had the similar head and tail spot like your ducks did. See below:







Below is her during her teen stage (3-4 weeks) when she started darkening up:





Below is her today at two months old. She has her adult plumage. I think she is just gorgeous. She has very soft markings around her eyes and white-tipped feathers on her wings. The only problem is, her name doesn't fit anymore. She's not such a snowflake, lol. But I sill love her.





Below is her mother, Jeepers (front left), who is full welsh harlequin. Her father is my full mallard drake, Potato, who is also in the photo at the very back. He is the father of all my mutt ducks, I believe, and is quite the little Casanova



The two yellow ducklings in the back of the picture below are Jeepers and my male WH as ducklings. No black spots like Snowflake had.



So yeah, your ducks are likely to be WH mixes, or at least some kind of mixes since they don't really fit any one breed, but they're still so gorgeous. I just love mutt ducks

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@PotatoWaffles Does Snowflake still look like this pic?? I've been looking everywhere to see what WH mixes might look like! My WH is sitting on 21 eggs due to hatch in a few days and the possible fathers are a jumbo pekin and a mallard!!