BeeWeaver tolerated more stinging to produce bees that did not perish when left hives untreated for varroa and tracheal mites. Between 1996 and 2002 our bees were more defensive on average with the chance of extremes in both directions (super gentle to intolerable). Since 2001 we have been able to refocus on all the traits that we want our bees to have including good attitudes. Each year there has been significant improvement. Not only in our opinion but in that of our customers.