The willow gall sawfly has been introduced to Australia. It originates from Europe and Western Asia. It lays eggs in willow leaves and causes red/green galls.
Pontania proxima (Willow Gall Sawfly), around 5mm
Mid October 2018
Hobart
Found indoors.
Early January 2013
Franklin
In a yard with a large willow.
References
Kay, M.K. 1980: Pontania proxima (Lepeletier) (Hymenoptera: Tenthredinidae). Willow gall sawfly. New Zealand Forest Service, Forest and Timber Insects in New Zealand No. 45.