You should be up here in rural Queensland if you think mudwasps are a pest down there Gadge. We have a variety up here that is so small they are hardly visible and can get into holes that you would not think anything should be able to get into let alone take mud and food to provision and seal the nest for their young, and turn around inside and fly out again. It always fascinates me how minute all the things like muscles and organs must be inside those tiny bodies. For example, how the hell does anything pass through the body of a pin waisted wasp?
We must have something similar down here too, aussietrev. I've encountered their works in the 'pigtails' of a scrounged LPG cylinder switchover manifold - which I wanted because it has an adjustable high pressure regulator on it.
The unit had been mounted on a wall, out in the open, for several years - with no protector caps on the pigtails' cylinder end fittings. Some insect had plugged both pigtails for at least 150mm or so from the open ends - I had to uncoil them, so that I could use a piece of stiff wire to clear them, to the point of being able to flush the rest of the crud out!
