This is a drone bee. Harmless since it does not have a stinger. It is the male bee whose purpose is to mate with a queen. Once it does this it dies.
Looking into the hive. This is were the juvenile bees are busy looking after the brood, the queen is laying her larvae and the comb is filled with pollen, honey and larvae.
The frame showing the white capped comb; full of honey, the brown capped comb; full with a growing larvae, open comb with days old larvae (little white specs) and open comb with evaporating honey.