''Ypsolopha senex'' is a

moth Moths are a paraphyletic group of insects that includes all members of the order Lepidoptera that are not butterflies, with moths making up the vast majority of the order. There are thought to be approximately 160,000 species of moth, many of w ...

of the family

Ypsolophidae Ypsolophidae is a family of moths with some 160 species. They are included in the Plutellidae by many authors. Systematics This is a list of genera and selected species. Ypsolophinae * '' Phrealcia'' Chrétien, 1900 * '' Ypsolopha'' Latreille, ...

first described by Lord Walsingham in 1889. It is found throughout North America. In

Canada Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by tot ...

it occurs in most provinces, from

British Columbia British Columbia (commonly abbreviated as BC) is the westernmost province of Canada, situated between the Pacific Ocean and the Rocky Mountains. It has a diverse geography, with rugged landscapes that include rocky coastlines, sandy beaches, ...

and

Alberta Alberta ( ) is one of the thirteen provinces and territories of Canada. It is part of Western Canada and is one of the three prairie provinces. Alberta is bordered by British Columbia to the west, Saskatchewan to the east, the Northwest Ter ...

Manitoba Manitoba ( ) is a Provinces and territories of Canada, province of Canada at the Centre of Canada, longitudinal centre of the country. It is Canada's Population of Canada by province and territory, fifth-most populous province, with a population o ...

. It is present in most of the continental United States. It is known from a wide variety of habitats, including riparian ecosystems, mixed wood forest and

alpine tundra Alpine tundra is a type of natural region or biome that does not contain trees because it is at high elevation, with an associated alpine climate, harsh climate. As the latitude of a location approaches the poles, the threshold elevation for alp ...

. They are of a uniform, drab colour. Adults are on wing from June to September. There is probably one generation per year. The larvae feed on the leaves of ''

Salix Willows, also called sallows and osiers, from the genus ''Salix'', comprise around 400 speciesMabberley, D.J. 1997. The Plant Book, Cambridge University Press #2: Cambridge. of typically deciduous trees and shrubs, found primarily on moist so ...

'' species.

References

Ypsolopha Moths of North America Moths described in 1889 {{Ypsolophidae-stub