Duckling Identification

[TopatoDuckbun]

Hello! I just got new tractor supply babies and I can't figure out what breed they are! I know what the colored ones are, but the dark yellows and yellows are confusing. I think the darker yellow ones are either buff or welsh harlequin, and the yellow ones are probably pekin but is there a chance they are white muscovy? How can you tell the difference between buff and welsh harlequin babies, and pekin and white muscovy babies?
I also have a solid blue duckling that I would think it's a khaki campbell but I have a khaki and they don't look like each other. He might be a blue runner but he doesn't stand like one...

yellow with very pale beak and dark yellow with brownish beak (the goslings in the back! so cute!!)

same yellow with solid blue and khaki in the back

solid blue in front and other yellow

one of the darker yellow's face markings (they have the same markings)

 

[MGG]

Hello! I just got new tractor supply babies and I can't figure out what breed they are! I know what the colored ones are, but the dark yellows and yellows are confusing. I think the darker yellow ones are either buff or welsh harlequin, and the yellow ones are probably pekin but is there a chance they are white muscovy? How can you tell the difference between buff and welsh harlequin babies, and pekin and white muscovy babies?
I also have a solid blue duckling that I would think it's a khaki campbell but I have a khaki and they don't look like each other. He might be a blue runner but he doesn't stand like one...

yellow with very pale beak and dark yellow with brownish beak (the goslings in the back! so cute!!)
View attachment 2567121
same yellow with solid blue and khaki in the back
View attachment 2567122
solid blue in front and other yellow
View attachment 2567123
one of the darker yellow's face markings (they have the same markings)
View attachment 2567127

@DucksAreBest @Isaac 0 @Miss Lydia

 

[DucksAreBest]

Hello! I just got new tractor supply babies and I can't figure out what breed they are! I know what the colored ones are, but the dark yellows and yellows are confusing. I think the darker yellow ones are either buff or welsh harlequin, and the yellow ones are probably pekin but is there a chance they are white muscovy? How can you tell the difference between buff and welsh harlequin babies, and pekin and white muscovy babies?
I also have a solid blue duckling that I would think it's a khaki campbell but I have a khaki and they don't look like each other. He might be a blue runner but he doesn't stand like one...

yellow with very pale beak and dark yellow with brownish beak (the goslings in the back! so cute!!)
View attachment 2567121
same yellow with solid blue and khaki in the back
View attachment 2567122
solid blue in front and other yellow
View attachment 2567123
one of the darker yellow's face markings (they have the same markings)
View attachment 2567127

The last picture is a Buff duckling because of the brownish stripes on its eye.
Does the other yellow duckling stand upright? If yes then it's a Fawn & White Indian Runner. If not then it's a Pekin.
And the blue one is a probably a Blue Runner.

@DucksAreBest @Isaac 0 @Miss Lydia

Thank you for the tag, @MGG.