they are paper wasps. if they aren't bothering you let them alone they are great spider control. they are pretty cool to watch trapping a spider in its own web. they hover over the web vibrating it to get the spider out of their hidey hole and they then sting it to paralyze the spider carry it back to the nest and pack the spider into the chamber (filling the chamber with spiders) for the larvae to consume as its it growing. if it is a nuisance or a danger then get rid of it.
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carolyn k
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