Is this a pure breed Australorp?

[UpstateChickenDaddy]

Seems the others on here who are far more expert than I are correct. Posting a photo of my black Australorp chicks (and their buff Orpington sisters) and the same guys and gals about six months.

 

[Rhodebar Lover]

I see a flock of rather young looking mixed 'back yard' chickens, no pure breeds whatsoever.

Agreed