Help identify orpingtons and wyandottes, and gender please

[Alohapili]

I'm new to both orpingtons and wyandottes, and we had a mix of hatching eggs. These babies were born on Sept 10th.
Please help me identify orpingtons and wyandottes, gender and possibly some speculation on colors.











Splash Laced Blue Wyandottes
Laced Blue or Black Wyandottes
Black Wyandottes
Lavender orpington
Black orpington
Blue orpington
Lavender wyandotte
Silver laced wyandotte
Black wyandotte

 

[The Moonshiner]

Orpingtons should have single combs and white shanks.
Wyandottes should have rose combs and yellow shanks.

 

[Alohapili]

I'm having trouble knowing the difference between single and rose combs at this age. I've only ever had single comb chicks/chickens before this... so I just assume the bigger combs are roosters

 

[Alohapili]

Can anyone help me identify what a rose comb or single comb looks like at this age, for females and males?

 

[The Moonshiner]

Here's one male and one female with single combs.
I think they were 19 days old here.

 

[WingItRanch]

There’s a lot going in those photos… I’ll just add I could only see one obvious cockerel (#4)

 

[Alohapili]

Orpingtons should have single combs and white shanks.
Wyandottes should have rose combs and yellow shanks.

What if they have black shanks?

 

[Bantam bell Wood]

I'm new to both orpingtons and wyandottes, and we had a mix of hatching eggs. These babies were born on Sept 10th.
Please help me identify orpingtons and wyandottes, gender and possibly some speculation on colors.

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Splash Laced Blue Wyandottes
Laced Blue or Black Wyandottes
Black Wyandottes
Lavender orpington
Black orpington
Blue orpington
Lavender wyandotte
Silver laced wyandotte
Black wyandotte

This is my first year with my own flock. I’m wondering why the chicks have banded legs and what you use for bands?

Thanks and especially for your patience if this is a screamingly obvious answer!