Found this:
Bees
Looks like ignoring them is a good option.
Bees
Bees don't cause any problems to your property, and nor are you in danger of being stung if they are left alone and unprovoked. After the summer season the bees will go away and not return to the nesting site the following year. By the time a colony has become obvious its activity will be about to decline naturally. Generally, colonies formed in spring usually decline naturally by late July, if not sooner. Therefore If at all possible always bee nests alone to thrive as their presence is actually beneficial for gardeners and their crop.
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