Any chance of adding a photo that clearly shows the fruiting head ? There are some in the second photo, but not clear enough to show the shape of the beak (little projection of each achene).
Hi, I can hear Mixophyes fasciolatus (https://www.frogid.net.au/frogs/mixophyes-fasciolatus) in the distance, assume that's what you are wondering about. There is also Litoria dentata (https://www.frogid.net.au/frogs/litoria-dentata) called around