I visited Melbourne Zoo last weekend, and have a couple of notes:
-The Tree-shrews are gone, and have been replaced with a trio of parrots - I think Red-bellied Conures, but I'll need to check that.
-A Red Panda is expected to give birth shortly, a perimeter has been established around the exhibit to increase privacy.
-Baw Baw and Stuttering Frogs have gone on display.
-The Australian section has been altered slightly, with a new exit path from Kangaroo Walkthrough that bypasses much of the exhibit and takes visitors straight out to the Maze. I'm not sure what the point of this is.
No other notable changes that I saw, although I didn't see the whole zoo.