The Hornet Moth or Hornet Clearwing, (Sesia apiformis), is a large bulky moth which is a brilliant natural imitation of a hornet, however despite this the moth is perfectly harmless.
The Hornet Moth is easily confused with the real Hornet and the Lunar Hornet Moth. The moth is as large as a hornet and even has the hornet's rather jerky flight when disturbed, but it has more yellow and lacks the waist between the abdomen and the thorax. Lunar Hornet Moths lack the yellow head and shoulders and has a black collar, unlike the Hornet Moth which has a yellow collar. The Lunar Hornet Moth flies from July to early August, though this is not a reliable identification guide.
As with all British clearwing moths, there is one generation every year. It flies from mid June to July and sometimes into early august.
It overwinters as a larva one and sometimes two times, after which it stays in its cocoon for another winter. Adults are often found on poplar trees straight after emergence. The females lay their eggs at the base of poplar trees, the larval food plant .The larva hatch and feed mainly just beneath the surface of the bark, near ground or below it. Exit holes can often be seen near the base of poplar trees and there may be pupal cases nearby.
Parks, hedgerows, golf courses, quarries, pits, fens, plantation edges and pond edges. Trees in open habitats with little vegetation round the base are a particular favourite.