The bees leaving one hive for winter flights and not the others does not seem
unusual to me. I have seen it before. I have assumed it to be a
diffence in genetics. It seems that everything in the bee world is
controlled by genetics... I wouldn't worry... but I would be interested.
Larry Krengel
Marengo, IL (northern Illinois, USA)
P.S. Mark you calendar - March 9, 1996 - Second Midwest Beekeeping
Symposium, Crystal Lake, IL (between Chicago and Rockford).