Agonopterix alstroemeriana it was discovered near Columbus, Ohio. It was established in Illinois in 1993, after being identified by the rolled leaves of "Conium maculatum," a characteristic indication of the presence of "A. alstroemeriana." The poison hemlock moth can be found wherever its host plant ("Conium maculatum") occurs. Thus, the moth is most commonly seen in open fields and roadsides in suburban and rural locations. In the U.S., "A." "alstroemeriana" often winters under the bark of firewood; then flies away after being warmed up when the wood is brought into the house. Moths also may come inside buildings and housing during the
Conium maculatum the stem. All parts of the plant are hairless (glabrous); the leaves are two- to four-pinnate, finely divided and lacy, overall triangular in shape, up to long and broad. It has been introduced and naturalised in many other areas, including Asia, North America, Australia and New Zealand. The plant is often found in poorly drained soil, particularly near streams, ditches and other watery surfaces. It also appears on roadsides, edges of cultivated fields and waste areas and is considered an invasive species in 12 U.S. states. "Conium maculatum" grows in damp areas, but also on drier rough grassland, roadsides and