Black Australorps: Any guesses on gender of these 6 weekers?

[WVChickNboots]

Any guesses on the gender of the Black Australorps in this pic? I have two with long tails, and four with short tails. They're six weeks old.

 

[Chicken Girl1]

They all look like pullets but one of the white ones maybe a cockerel.

 

[BusyBearMama]

Can't tell too well from this pic :-/ if you had individual pics from the side?

 

[Wyandottes7]

They all look like pullets but one of the white ones maybe a cockerel.

I agree.

 

[BantamLover21]

They all look like pullets but one of the white ones maybe a cockerel.

x3

 

[WVChickNboots]

Actually the white ones (Amberlinks), I'm 99% sure I have 3 roos and one hen. I can get better pics soon. I'll get better pics of the Black Australorps as well. Stay tuned.