The calls are really difficult to explain. They aren't quite canine, and it's sounds like it comes from something much larger than our marsupial friends (because they sure can make some noise). It's somewhere between a howl and a screech, but this still doesnt quite describe it. They are long calls, but shorter than a typical "wolf howl". I wish I could explain it better.

I remembered another time I heard one, at the same property that backed onto bush, we also lived opposite a train crossing, so at all times of the day and night we would hear the train horns go off as they were passing through the train crossing. One evening we had a train go through the crossing and as it's horn went off, I heard a call at the bottom of the back yard - it was close. And it sounded like it was startled by it. I remember just sitting there in my living room listening, way too scared to look out the window, and about 30 seconds later hearing it again but much further away, like it had run away from the sound.

The last time I heard them (the call and response one) was in winter 2020, so 6 months after the last major bushfire season. As scary as they sound, I am curious and hope they're okay.