The queen wasp is the largest member of the colony, and she plays a crucial role in the survival and success of the nest. Queen wasps are typically larger than worker wasps, with some species reaching up to an inch in length. open the link This size difference is due to the queen's reproductive role, as she needs to be able to carry and lay eggs. The size of a queen wasp can vary depending on the species. Some species, like the European hornet, have queens that can reach over an inch in length...