No population at all at the moment. Might change when the weather cools. My swan plants are the "giant" variety and grow about 10 foot tall, so sustainability isn't usually as big of a problem it is for people with little plants.
I can't find where the wasps have their lair yet. It's annoying because the internet says spray individuals with flyspray then run away, but running isn't really an option for me.
The homeowner says they're going to cut down 3 of my 5 plants soon so it's a pity they didn't get used.
Yeah this is the problem. I'm not seeing a stream of anyone and I've wandered all over the area. They're Aussie paper wasps so normally their lairs are easier to spot from a distance than yellowjackets but the wasps themselves are harder.
If I can find it, they're toast. The trick to killing wasps is to go out on a dark night, with all your skin covered, and suffocate them. No running required.