oh, I thought you might have been there in the afternoon too. Okay, there are some new photos in the gallery that I put there the other day.My most recent visit was at night though, so must not have encountered it, as I don't recall a new walk-in (although maybe a small one that's been there a couple of years with woodswallows, kingfishers, stilts, OBP..., sort of within the kangaroo/wallaby walk area?). Did you see the new eagle aviary?
The walk-in aviary is very nice indeed, and is near the entrance (to the left) next to the new (2015) wombat enclosures which you also may not have seen unless they are on the night tour. I'm not sure about the other one you mention? There is a set of three aviaries in the wallaby area which had those species previously, but they weren't walk-in.
The eagle aviary is really nice too, I liked it, haven't seen another one designed like that before (I think I've only ever seen birds of prey in standard aviaries or tethered). There are a few new bits and pieces about the place to see next time you go there.