Hornets are wasps of the genus Vespa, closely related to (and resembling) yellowjackets.

There are about 20 hornet species. Most live in tropical Asia, but the insects are also found in Europe, Africa, and North America, where the European hornet was introduced by humans.

These social insects construct hives by chewing wood into a papery construction pulp. They mature from egg to adult inside the community hive.

Queens dominate hornet hives and are the only females to reproduce. Most other hornets are asexual female workers that perform essential community duties such as building the hive, gathering food, feeding the young, and protecting the colony. Males are few and they have only one real role—mating with the queen. Males typically die soon after