A group of them are housed in the moat of the outdoor Tree Kangaroo / Southern Cassowary exhibit. Signed as New Guinea Snapping Turtle, E.novaeguineae at the exhibit, but identified as E.branderhorsti in other media.
When I was interning under the wildlife nutrition centre, there were 2 diet charts detailing 0.1 'Australian' and 5.7 'New Guinea' side-necked snapping turtles, tho the binomial names were not included for some reason.
I immediately assumed that E. novaeguineae represented the New Guinea turtles, until I came across Joel Sartore's shots of the collection's E. branderhorsti.
Until now, not sure if WRS possesses 2 or just a single species of Elseya.
@Mr Gharial the Tree Kangaroo and Cassowary areas are separated by a moat. I believe there is an older picture of the exhibit somewhere in the Singapore Zoo gallery
