They are around here too, although probably not as concentrated as in other warmer areas, they do like the quick coupler connection on the 20 lb. BBQ tank, got me twice so far on that, should have remembered to use the plastic plug on the valve. I find them on the side of the foundation, along masonry around the house and on things that sit too long. Those dark blue ones sure have a unique color, real nice gun metal blue, don't seem to be agressive like other wasps. The old oil bath air cleaners with the pre-cleaner head and jar on top, like an old Donaldson, on the old caterpillars is a favorite place of paper wasps and probably the mud daubers to nest, although the paper wasps seem to win out on these locations, definitely have to cover those up tight, I take the top off and cover it with a tight fitting coffee can, the trick is to get any new nests early, kind of a short seasonal thing, after a certain time, no more new nests appear and when you get them early, only have to deal with the over winter survivors, takes awhile for the eggs, larvae to mature. There no shortage of those paper wasps here that is for sure.
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