Eurois occulta
Encyclopedia
The Great Brocade or Great Gray Dart (Eurois occulta) is a moth
of the family Noctuidae
. It is found in Northern and Central Europe
, Northern and Central Asia
and the Northern parts of North America
(coast to coast in Canada
, south in east to Virginia
and the Great Lakes States).
The wingspan
is 50-60 mm. The moth flies from June to September depending on the location. There is one generation in North America.
It has been suggested, based partly on pupal remains in peat
, that outbreaks of this species played a role in the collapse of Viking settlements in Greenland
. Unfortunately these deposits at Anavik are now dried out and any potential evidence has been lost.
The larvae feed on Myrica gale
, Vaccinium
, Birch
, Willow
and other herbaceous plants.
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 Noctuidae
Noctuidae
The Noctuidae or owlet moths are a family of robustly-built moths that includes more than 35,000 known species out of possibly 100,000 total, in more than 4,200 genera. They constitute the largest family in the Lepidoptera....
. It is found in Northern and Central Europe
Europe
Europe is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways connecting...
, Northern and Central Asia
Asia
Asia is the world's largest and most populous continent, located primarily in the eastern and northern hemispheres. It covers 8.7% of the Earth's total surface area and with approximately 3.879 billion people, it hosts 60% of the world's current human population...
and the Northern parts of 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...
(coast to coast 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...
, south in east to Virginia
Virginia
The Commonwealth of Virginia , is a U.S. state on the Atlantic Coast of the Southern United States. Virginia is nicknamed the "Old Dominion" and sometimes the "Mother of Presidents" after the eight U.S. presidents born there...
and the Great Lakes States).
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 50-60 mm. The moth flies from June to September depending on the location. There is one generation in North America.
It has been suggested, based partly on pupal remains in peat
Peat
Peat is an accumulation of partially decayed vegetation matter or histosol. Peat forms in wetland bogs, moors, muskegs, pocosins, mires, and peat swamp forests. Peat is harvested as an important source of fuel in certain parts of the world...
, that outbreaks of this species played a role in the collapse of Viking settlements in Greenland
Greenland
Greenland is an autonomous country within the Kingdom of Denmark, located between the Arctic and Atlantic Oceans, east of the Canadian Arctic Archipelago. Though physiographically a part of the continent of North America, Greenland has been politically and culturally associated with Europe for...
. Unfortunately these deposits at Anavik are now dried out and any potential evidence has been lost.
The larvae feed on Myrica gale
Myrica gale
Myrica gale is a species of flowering plant in the genus Myrica, native to northern and western Europe and parts of northern North America. It is a deciduous shrub growing to 1–2 m tall. Common names include Bog Myrtle and Sweet Gale...
, Vaccinium
Vaccinium
Vaccinium is a genus of shrubs or dwarf shrubs in the plant Family Ericaceae. The fruit of many species are eaten by humans and some are of commercial importance, including the cranberry, blueberry, bilberry or whortleberry, lingonberry or cowberry, and huckleberry...
, Birch
Birch
Birch is a tree or shrub of the genus Betula , in the family Betulaceae, closely related to the beech/oak family, Fagaceae. The Betula genus contains 30–60 known taxa...
, Willow
Willow
Willows, sallows, and osiers form the genus Salix, around 400 species of deciduous trees and shrubs, found primarily on moist soils in cold and temperate regions of the Northern Hemisphere...
and other herbaceous plants.