Thanks Owen, my fantasies brought me to a conclusion of something like a Speckled Piculet roaming around the hills of Wonderland Villas.
But a fantasy shall remain a fantasy I think...
Yes, frogs may well be the most probable explaination, but it was different to the usual Brown Tree Frogs call.
Anyway, A Chestnut-winged Cuckoo calling tonight, not a bad record for Wonderland Villas.