Thank you both. That's what we thought, too. Do you think that it might also be a bandicoot digging around the roots of bursaria spinosa (sighting #4344400)? Or a different animal? (definitely not a pig or wombat)
The one at the base of the bursaria looks less convincing to me but a bit tricky to tell from the photo. Doesn't quite look neat enough or the typical conical shape but then again there are a lot of roots in the way.