My property contains about 20 olive trees. These were not planted by me but are the very commom wild trees that are reasonably invasive in our area (West Central Indiana). They bloom with small white trumpet shaped flowers that I always figured were too long for use by my honeybees. This weekend, going around the property, BumbleBees were working all the olives. Three of the trees were covered (standing under the trees and shutting your eyes resulted in the trees humming) with honeybees. The other trees were untouched. I could not see any difference between the flowers of the trees. All the trees seemed to be in the same stage of blooming. I don't think there are seperate male female trees like there are in Holly's. Anybody know what's going on?