I thought it was confined to the OSR areas, where bives are often found conveniently ready to go stacked on the trailers they were brought on.
Checked some very slow to mate mating nucs yesterday and 3 out of 4 were queenlessness, that's lousy odds on loosing them to mating flights, but I'm pretty sure the culprit is the 3 families of swallows that nested in the barn, I'm going to have to discourage them next year.The only saving grace is that they were probably duds anyway (like most of mine this year)
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