The galah and sulfur crested have not been exhibited for over 15 years. Both have proved difficult to remain out of reach of the guests. Similar story for the wonga pigeon who's also not on exhibit.
The finches were removed a long time ago as well so the kookaburra could be exhibited in the free flight aviary. The remaining two are what's left of the aging out population.
The remaining pigeons/ doves (minus the pied imperials) are all aging out off exhibit.
Definitely not as populated as it once was when it opened in 2005, although that was problematic in its own way for separate reasons.
The problem moving forward is the difficulty in acquiring bird species native to the Northern Territory that not only meets the geographic requirements, but the very complex display needs for a three story, multi- species exhibit. Unless of course it's filled with budgies and lorries, which I know the curators don't necessarily find desirable.
It would be so disappointing if it ended up just having common species