The European hornet was introduced to the United States in New York, between 1840 and 1860. Since then, it has spread to the other east coast states, across to the Mississippi River, and up into parts of North and South Dakota. Workers are brown with yellow markings and, being hornets, can reach up to one and a half inches in length. They do not look like northern giant hornets, also known as “murder hornets,” which are almost two inches long, making them the largest hornet in the world. While the European hornet is established in the United States, northern giant hornets are not, and were last seen in 2021 in Washington state.