We made a hivetop bee feeder this afternoon. As nectar gets more scarce during the winter we need to feed a thick sugar syrup to the bees for their winter food. Each of the hives has one of these.
This box has two parts. On the left is an area open to the hive below where bees can enter. They crawl over the low wall and cling to the screen to get to the sugar water. If they get past the screen and into the open sugar-water ocean they drown. Bees don’t swim well.