Oidaematophorus grisescens is a moth

Moth

A moth is an insect closely related to the butterfly, both being of the order Lepidoptera. Moths form the majority of this order; there are thought to be 150,000 to 250,000 different species of moth , with thousands of species yet to be described...

 of the Pterophoridae family. It is found in North America

North America

North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...

 (including California

California

California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

, Colorado

Colorado

Colorado is a U.S. state that encompasses much of the Rocky Mountains as well as the northeastern portion of the Colorado Plateau and the western edge of the Great Plains...

, Oregon

Oregon

Oregon is a state in the Pacific Northwest region of the United States. It is located on the Pacific coast, with Washington to the north, California to the south, Nevada on the southeast and Idaho to the east. The Columbia and Snake rivers delineate much of Oregon's northern and eastern...

, Montana

Montana

Montana is a state in the Western United States. The western third of Montana contains numerous mountain ranges. Smaller, "island ranges" are found in the central third of the state, for a total of 77 named ranges of the Rocky Mountains. This geographical fact is reflected in the state's name,...

, British Columbia

British Columbia

British Columbia is the westernmost of Canada's provinces and is known for its natural beauty, as reflected in its Latin motto, Splendor sine occasu . Its name was chosen by Queen Victoria in 1858...

 and Alberta

Alberta

Alberta is a province of Canada. It had an estimated population of 3.7 million in 2010 making it the most populous of Canada's three prairie provinces...

).

The wingspan

Wingspan

The wingspan of an airplane or a bird, is the distance from one wingtip to the other wingtip. For example, the Boeing 777 has a wingspan of about ; and a Wandering Albatross caught in 1965 had a wingspan of , the official record for a living bird.The term wingspan, more technically extent, is...

 is 20-29 mm. The head and palpi are grey, with a fuscous tinge on the apex of the palpi. The antennae are spotted with grey and fuscous. The thorax and abdomen are greyish, sprinkled with fuscous. The legs are greyish white, tinged on the segments and on the tips of the spurs with fuscous. The forewings are grey, slightly spotted with white and dusted with fuscous scales, the hind portion touched with ferruginous. There is a white space on the costa before the base of the fissure, and another beyond and obliquely connected by whitish scales with the base of the fissure. There is also a whitish spot before the middle of the hind margin and an indistinct fuscous spot above it. The fringes are mottled with white and greyish fuscous. The hindwings are cinereous and the fringes whitish mixed with grey.

The larvae feed on the leaves of Artemisia

Artemisia

- Botany :* Artemisia , a genus of plants including the sagebrush and wormwood- Geography :* Artemisia Geyser in Yellowstone National Park* Artemissia, Messinia, a Greek village west of Taygetus mountain in the Peloponnese...

species.