Some areas of the US actually do have those Asian hornets, known as Japanese Hornets here in NC. They are huge and fairly hard-shelled so hard to kill, a swat just pisses them off and you really don’t want to do that. Fortunately they’re pretty laid back and not generally aggressive, but if you do have the misfortune of getting stung by one I’ve heard the sensation compares to being shot with a nail gun. You can tell when one gets in the house because you can feel their wing beats in the air, yep like a hummingbird. They’re huge for a hornet but they’re not quite as large as a hummingbird, not the ones around here at least. They’re useful because they attack and eat wasps, even the larvae in the nests.
Asian 'killer' hornets: Why you don't need to be worried about invasion from France
Spouse saw one in lake cabin Missouri.