Zoos Victoria really need to assess their market. Victorians will visit Healesville as well as Melbourne Zoo and Werribee Open Range Zoo. Many of them will have annual passes and appreciate visiting Healesville to see a diverse range of natives beyond the basics.
These same visitors still want to see exotics and when they visit Melbourne Zoo, they don’t want to see less and less megafauna every time they go.
International visitors will visit Melbourne Zoo and possibly Werribee. The average tourist wants to see a Koala, a kangaroo, a Kookaburra, a Tasmanian devil and a Dingo. Cater beyond that and why would they need or want to go to Healesville?