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Why do bees hang around flowers?

Many plants use nectar as a way of encouraging insects (bees, wasps, butterflies, etc.) to stop at the flower. Honeybees "make their living," so to speak, by gathering nectar from flowers and turning it into honey. In the process of gathering nectar, a worker bee transfers pollen grains from one flower to another and pollinates the flower. This is why the plant made the nectar. Bees also gather the pollen - it is a source of protein for bees. They have little baskets on their hind legs, and they fill the baskets with pollen so they can carry it back to the hive. 

By mixing honey and pollen together, bees make beebread, one of the foods that bees feed to larva as they are growing. Some bees in the hive produce a food called royal jelly using special glands in their heads. Royal jelly is a special kind of food fed to bee larvae. If you feed nothing but royal jelly to a bee during four critical days while it is growing, you get a queen bee. 

Sometimes bees gather sticky substances like tree sap. They turn the sap into propolis, which is also called bee glue. Bees use this glue to fix the hive, plug holes and more. Finally, bees at a certain age can make beeswax. They have little glands on their undersides that secrete wax as tiny flakes. The bees grab the wax flakes with their mouths and add them to the hive.