The worms, according to Mike Johns, set up intestinal and liver problems and lower the immunity of the bird , so that secondary problems arise and the bird cannot digest food.
The bees build up a store of honey during the summer which they eat through the winter. Beekeepers will take a surplus of honey from the hive, but won't take all the honey there is. They also feed the bees with sugar syrup after taking the honey to make sure the bees have enough to see them through the winter. Honey.
The sugar that is fed in the fall is turned into honey by the bees, so even if a beekeeper tells you their bees survive on honey over the winter, much of that honey may have simply come from Ziplock bags full of sugar water.