Thanks for the info and for letting us know that their density was so great that they were showing up on the BOM radar. Which colour was it appearing as? I guess we won't ever know the true number but it may well be in the billions, which is a good thing to see again.
@RobG1 I actually don't think the lobes on this one project far forward enough to be C fuscata, but the angle isn't great. Still, I reckon it's C carnea (and yes, the second photo is C/G major).