Help! What breeds are these?

[Littleshadow]

I'm going to agree the top one is an australorp and the bottom is a cuckoo marans.

 

[MontanaChickDoc]

With that very large and diffuse head spot, you should prepare yourself that it's a rooster. Females have a small distinct head spot (hard to see in the photo exactly but it looks larger and diffuse, maybe I am mistaken). Rooster's head spots have blurry edges and/ or extend down the head more, rather than just being a dot.

 

[drumstick diva]

agree with Alexandra