@MatthewFrawley Just had a quick look on eBird. On 15 May, 2025, 12 were reported. On 23 October, 2018, 23 were reported. 2025 has been a good year for them here.
I have seen the larger Great Egret around Jarramlee Pond and along Ginninderra Creek at Jarramlee Park. Sightings are not common and their necks are longer than their body plus heads are more pointed and streamlined.