There have been quite a lot of attempt of mixed primate exhibits in Indonesian zoos, some works to this day.
Ragunan Zoo last month added a flock of white-breasted waterhen (Only seen a pair but there could be more) and atleast an Malaysian giant turtle in their massive Bornean orangutan exhibit in the Schmutzer Primate Centre. There used to be a mixed exhibit with Javan slow loris and Java mouse-deer up until this year in the small mammal complex.
Taman Safari Bogor have one of their siamang exhibit also housing mute swans, a pair of lesser adjutants, and several domestic ducks. In the past, there used to be a group of little black cormorants and even further several greater flamingos there. In the eastern grey kangaroo exhibit, they also have ring-tailed lemurs and black-and-white ruffed lemurs that interact with the kangaroos. In the Primate Centre, the Kloss's gibbon exhibit used to have an black swan in their moat, while further back, there used to be bizarre but unique mix with Bornean orangutan, Bornean white-bearded gibbon, lar gibbon, and even an female Malayan sambar.
In Bandung Zoo, currently the siamang have Australian pelicans in their moat, though atleast until earlier this year they have Malayan porcupines and Asian small-clawed otters instead (The otters weren't able to enter the island housing the porcupines). The nearby silvery gibbon exhibit have domestic goose in their moat.
Surabaya I think have their large group of proboscis monkey being mixed with Bawean deers. Other mixed exhibits involving proboscis monkeys include Batu Secret Zoo (With glossy ibis and several fishes), Taman Safari Prigen (With Javan muntjacs), and Bali Safari (With Malayan porcupines and filament barbs).
Batu Secret Zoo have a group of pied stilts in the lemur walkthrough aviary (Ring-tailed lemur, black-and-white ruffed lemur, red ruffed lemur, and black lemur). In Bali Zoo, they have their ring-tailed lemurs in a small walkthrough aviary with lesser mouse-deer, large flying fox, green iguana, and others).
