We inspected our hive the other day- and found a few hundred (or more) dead bees on top of the inner cover. I assumed the bees had taken to dumping their dead workers upstairs as we had left the hole uncovered… Afterwards - Looking at a photo of them I noticed many/most had their tongues sticking out. I googled- and saw this was listed as a symptom of pesticide poisoning?
The hive appeared to be otherwise very healthy- innumerable bees covering every frame thickly, brood at all stages, tonnes of capped honey, pollen, etc.
By way of background- the last inspection a few weeks ago we removed the Flow super and forced all the bees down to the one box- making it very crowded. We have found dead bees on the inner cover before but never this many. All of these bees accumulated in just a few weeks. We are coming into winter now.