It would perhaps be useful to have data for feral colonies. Perhaps there may be some historical data, but not too many feral colonies now to compare their losses with managed colonies.
Seems to me that beekeepers are obsessed with keeping bees alive through the winter regardless of whether that is having a bad effect on the long term health of bees as a whole.
Best wishes
Peter
52°14'44.44"N, 1°50'35"W
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