My cousin Jan and her partner Rodney went to Lake Eyre during its recent flooding to see what they could see.
One thing was this desert-living pie-dish beetle (one of the Helea species, perhaps H. waitei but I’m not sure).
I’ve not seen one of these myself – they occur in the inland arid regions of Australia, apparently foraging at night on decaying vegetation. They are wingless, so do not fly. Jan was lucky to see this one during the day. You can see a more detailed post about pie-dish beetles in Western Australia here.