Two, possibly juvenile male, Satin Bowerbirds appeared to be practicing a mating dance near a bower. One was definitely a juvenile male as it was moulting into its dark satin plumage, with patches of blue appearing. The other bird did not have any clear patches of blue. I think the other bird was a male as well because it was putting sticks into the bower, like it was building it. The first bird actually undertook a bit of a dance while I was watching, complete with the metallic-like whirring sounds these birds make.