Beekeeping has a long history dating back thousands of years, with Egyptians depicting beekeeping in temples from 2422 BC. Beekeepers wear protective clothing and use smoking devices to drive bees out of hives when collecting honey. There are over 20,000 bee species, and a bee colony consists of queen, worker, and drone bees in a strict caste system, with the queen laying eggs and colonies reproducing through swarming when populations grow too large.