Honey bees have three castes in their colonies: workers, queens, and drones. Workers are 1/2 to 5/8 inch long and have well-developed heads with two short antennae and large eyes. Because they are covered with fine hairs, they have a fuzzy yellow-brown to black appearance. The abdomen has a striped appearance. There are two pairs of wings, the hind pair shorter that the front. Workers have a barbed stinger at the end of their abdomen that is used against anything that threatens the colony. Queen bees are the largest member of the colony measuring from 5/8 to 3/4 inch long and except for their size; they look identical to the workers. Drones are about 5/8 inch long and much stouter and darker than workers or the queen. The queen is the only fertile female and produces all the eggs for the colony. She is capable of producing 1,000 to 2,000 eggs per day. drones serve only to fertilize the queens and are driven off by the workers after they have served that purpose. Workers live five to seven weeks during the summer. Honey bees are social insects that live in the colony or hive with as many as 20,000 to 80,000 worker. Workers collect nectar and pollen from plants, inadvertently pollinating flowers and allowing plants to the wax that that they secrete. The queen and all the bee larvae are fed and for the colony the entire population overwinters. Honey bees are not naturally aggressive; however, if the colony is threatened they will sting. Honey bees swarm when the queen begins to fail or the colony is too large. Swarms often are seen on a tree branch and when this occurs, the bees are not aggressive. The swarm lasts for 24 to 48 hours and then moves to a sheltered environment such as a hollow tree, bee hive, hollow wall, or attic.