Years ago (thirty or more) I had a number of Blueberry bushes in my garden of eastern N.A. wildflowers and shrubs. The bees always punched through the side of the blossom on flowers such as these (Vaccinium sp.). It went on for years, and in other plants with similar flower shapes too. There must have been a bee academy which left a scroll of good nectar and pollen gathering techniques for each following year. Stephen Putman Delaware now, eastern Pennsylvania back then.