Cockerels or pullets?

[Chimkin Nugget]

Hey everyone!
I am a new chicken owner and got a mixed breed flock, but am struggling to know which ones are male. All of them hatched late February. I noticed the tail feathers on these three curl inward, but I’m not sure if that means they are roosters. It’s hard to compare them to each other cause they all look different and are different sizes… any opinions?

 

[TheOddOneOut]

All are males

 

[LadiesAndJane]

Hey everyone!
I am a new chicken owner and got a mixed breed flock, but am struggling to know which ones are male. All of them hatched late February. I noticed the tail feathers on these three curl inward, but I’m not sure if that means they are roosters. It’s hard to compare them to each other cause they all look different and are different sizes… any opinions?

Ages?
First one is male.
Not sure how many birds are pictured.
Others I can not see combs well enough.

 

[Poultrybonkers]

All look like cockerels to me