I had bees move into a window in my basement years ago, eventually that hive died but a beekeeper set up hives near our creek. A beehive has more departures and arrivals than any airport and the complexity of their behavior is staggering. Any poison that made bees just a little bit stupid could have a major impact on the effectiveness of a hive — and if you take responsibility for bees there is a huge list of problems that can endanger a hive.