@Zoofan15
(albeit UK not Aus' in London Zoo's case i.e Mappin Terraces) the good old vacant exhibit filler 101 for Australian zoos ''..stick a couple'a 'Roos and Emus in there, 'she'll' be (al)'right''.
Surprised they didn't put some in the vacant Bongo exhibit at Melbourne (or Ostriches). Melbourne Zoo's versions of substituting with Australian animals we all have liked seeing but: Dingos in the Hunting Dog exhibit and Zillie the Cassowary in the old Mandrill exhibit (albeit sounds much better having Zillie in the big Free Flight Aviary which means old Mandrill exhibit freed up for concepts like great ones mentioned on here).
It surprises me that nothing has been done with the old Eastern bongo exhibit - even if it’s putting goats or something in there.
I’m of the belief the death of the female bongo (which led to the phase out the species from Melbourne Zoo) was a freak accident, albeit a very tragic one.
While Lowland nyala are equally flighty (a bull at Wellington Zoo died after running into a fence when it was spooked by fireworks); the exhibit they inhabit at the top of the zoo (old tapir exhibit) sees them in much closer proximity to visitors than the comparatively distanced bongo exhibit would.
Maybe a tapir will be the eventual occupant, with at least two exhibits advisable for management of a breeding pair.