where did you get them?
The comb on the black one is unique. It looks like it might be a buttercup comb. There is a breed: Sicilian Buttercup with that comb type, but I think that breed isn't black (not sure). Could it be a cross?
Otherwise, the other two birds on the pic together look more female - not much comb color or growth. The lighter colored one in the forefront has rounded feathering, but pointed saddle feathers won't be making an appearance yet. Some comb color, but some females get some color at this stage. The one in the back is harder to see, so I'm not sure on gender for that one. Could that one be Araucana (based on large cheek tufts and not much tail as Araucana are tail-less)? However, Araucana have pea combs, and I can't tell comb type as well on that one. I've also never had and Araucana, so no experience with that breed.