Welcome to BYC. Glad you decided join our flock. Black Australorps are my favorite standard breed. I've raised them for years (along with dozens of other breeds), and they are extremely hardy, calm and gentle (my children and granddaughter made lap pets of them), and the best layers of the standard, brown egg laying breeds. Please feel free to ask any questions you may have. We are here to help in any way we can. Good luck with your flock.
Welcome to BYC and the coop! There's a lot of great peeps here! Feel free to ask lots of questions. But most of all, make yourself at home. I'm so glad you decided to joined the BYC family. It sounds like you have a good mixed flock!