that is a good picture! and a significant sighting!! Don, remember the termite mount with scratch marks not far away which you noticed and of which I took photos (27 Jan 2017) and we had a correspondence about the mount? one of our volunteers took a photo of a young RB nearby in Feb 2018 (Varanus rosenbergi (Heath or Rosenberg's Monitor)) and Jochen saw a large RM not far from all these sightings (body length approx 1m) in Feb 2016 (unfortunately, no photo).
Many thanks trevsci. This is the most female looking goanna I have seen so far from Ainslie or Majura, but could be a juvenile male too. Females are seen much less at our Naas site and I guess the same would apply for A-M. I can't guess age. I don't think there is any reliable ageing method for Varanids, but we know Rosenberg's are capable of living at least 30 years in the wild. We will probably start a camera survey at A-M this summer. Hopefully that will help give an estimate of population size and may start to recognise some individuals for future years.
Correction!! As Matthew Higgins pointed out, my comment about 'most female looking' omitted consideration of 'Rosie' and 'Roxy', the females he found nesting on Mt Ainslie.