A very large mosquito, about 10mm excluding the wings and proboscis. The larvae eat other mosquito larvae.
Classification
from Australian Faunal Directory
Order Diptera - Flies, 8955 named species in Australia at Nov. 2021
Sub-order Nematocera - Flies having Long, Many-segmented Antennae
Family Culicidae - Mosquitoes, 223 species in Australia
Genus Aedes
Species Aedes alternans