The Australia Day event in Perth, on the 26th January each year, comprises a substantial airshow during the day, followed by a major fireworks display, launched from barges on the Swan River, in the evening.
The Grumman Mallard was listed as part of the Air Display at 5:00PM, under the show title, "Unusual Aircraft Landing And Take Off From Perth Water".
Australia Day City of Perth Air Show 2017 - Aviation WA