Latter 2 aren't present in NZ I don't believe, but I could see say Namaqua Doves and some african estrilid in here but I think it works fine as solely lovebirds given there's tons and constant activity from them.
@Mr Gharial@WalkingAgnatha the aviary contains a Meerkat enclosure. Doves would be killed and eaten as soon as they landed inside that. Waxbills spend a lot of time on the ground as well.
Right, forgot that'd be a problem since the lovebirds always stay out of it, netting would be a solution but again, not really a point since it works fine with just lovebirds.