Ypsolopha senex 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 family Ypsolophidae

Ypsolophidae

Ypsolophidae is a family of moth. They are included in the Plutellidae by many authors.-Ypsolophinae:* Phrealcia Chrétien, 1900** Phrealcia brevipalpella Chrétien, 1900** Phrealcia eximiella...

. It is found throughout 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...

. In Canada

Canada

Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

 it occurs in most provinces, from 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...

 to Manitoba

Manitoba

Manitoba is a Canadian prairie province with an area of . The province has over 110,000 lakes and has a largely continental climate because of its flat topography. Agriculture, mostly concentrated in the fertile southern and western parts of the province, is vital to the province's economy; other...

. It is present in most of the continental United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

. It is known from a wide variety of habitats, including riparian ecosystems, mixed wood forest and alpine tundra

Alpine tundra

Alpine tundra is a natural region that does not contain trees because it is at high altitude. Alpine tundra is distinguished from arctic tundra, because alpine soils are generally better drained than arctic soils...

.

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 species. Feeding occurs in a loose web. Pupation takes place in a silken cocoon of a tubular shape.