Re: Learned Lesson for 2019
I find that drowned bees are mostly a result of poor feeder design and failure by the beek to take pre-emptive measures, see biermann and GregV's posts above. I am a believer in the Beemax feeder by Betterbee and the Ceracell feeders as their design keeps the bees out of the syrup. If any bees are drowning, then they are being removed by the bees because I just dont see dead bees in the feeders unless they got into to resevior while the lid was open.
Thankfully, the bees are smarter than I am. They are doing well, in spite of my efforts to help them.