The photograph is of a New Holland Honeyeater taken on 31 May 2024 at the Western Remnant of Royal Park.
This bird is one of the most common birds in Melbourne. They feed on insects and nectar. As the photograph depicts, the face of the bird has quite a bit of pollen which suggests that they act as pollinators as well.
Nikon Z 9, Nikkor Z 800mm f/6.3 VR S @ 1/800s f/6.3 ISO1100