This is a Yellow-Headed Temple Turtle, Heosemys annandalii.
In the past, the zoo has had nominate M. emys in this space as well as mixed with the tree-kangaroos. I haven't seen them recently myself, but they could still be there.
@ThylacineAlive, Thanks for adding your own observations. The photo was not the best (out of sync and focus - the twin in the middle ... - ) and I rather went on past knowledge what was there ... before. I should have looked more carefully!!!!!