Paropsisterna bimaculata

This beetle changes from its yellow/gold colour to a red prior to overwintering.

Paropsisterna bimaculata
Image by David de Little, used with permission.

Female laying eggs – the colour of the eggs will change to a more grey-brown as the shell hardens.
Mid December 2011
kunanyi/Mount Wellington
Photos AD
Chrysomelidae-Paropsisterna_bimaculata-eggs  Chrysomelidae-Paropsisterna_bimaculata-eggs

Paropsisterna bimaculata
Image via David de Little, used with permission.

Winter colouring
Late October 2010
Mount Field National Park
Photo KE

Overwintering in the mud-guts of a fallen branch
Mid July 2016
Central Castra,
Photo KE

Late January 2009
Waterworks Reserve, Hobart
Photos KE
 

Mid April 2012
The Springs, kunanyi/Mount Wellington
Photo KE

Bird pellet showing large quanities of Paropsisterna bimaculata.  Some birds regurgitate the indigestible parts of their diet.  This pellet demonstrates how important the leaf beetles are in the food web.
Mid April 2012
The Springs, kunanyi/Mount Wellington
Photo KE

Mass strandings can be seen on beaches.  Some theories are that the beetles fly out to the moon shine reflected on the water, and then become stranded, monoculture (tree farm style) plantings generate large numbers of particular species.
Sisters Beach
Photos KE

Mid April 2017
Ben Lomond National Park (The Lookout)
Photos KE
 

Mid December 2020
Mount Field National Park
Photos KE
IMG 1732  IMG 1733  IMG 1734

Early January 2024
Edgar Dam
Photos KE
IMG 9670  IMG 9671

References

de Little, D. W. 1979. Taxonomic and ecological studies of the Eucalyptus-defoliating paropsids (Coleoptera: Chrysomelidae), with particular reference to Chrysophtharta bimaculata (Olivier). Ph.D. Thesis, University of Tasmania: Hobart.