The bee is taking nectar from the flower of an exotic shrub on the former Greenvale Sanitorium site. This particular shrub always has lots of native insects on it's flowers. It is very hard to find any native plants flowering in the park at the same time, probably because the native flora in the park is so diminished in diversity.
Classification
Species counts from Australian Faunal Directory
Order Hymenoptera - Wasps, Ants, Bees and Sawflies, 12202 named species in Australia
Family Apidae - A Long-tongued Bee family, 173 named species in Australia
Genus Exoneura - Digger Bees, 69 Species in Australia
Species ?