This moth is as large as a true Hornet, but is yellower and lacks the wasp-waist.

Searches for exit holes and old cocoons can be done any time of the year.

Adults can be found at rest on Poplar trunks after emergence, usually early morning, on cool, cloudy days. (7am - 8.30am).

Pheromone attractants: api New: hor

Moth activity times: 07:30-10:30.

Overwinters as a larva, at least twice just beneath the bark of the food plants.