The four-dotted alpine (''Erebia youngi'') is a member of the subfamily

Satyrinae The Satyrinae, the satyrines or satyrids, commonly known as the browns, are a subfamily of the Nymphalidae (brush-footed butterflies). They were formerly considered a distinct family, Satyridae. This group contains nearly half of the known divers ...

of the family

Nymphalidae The Nymphalidae are the largest family of butterflies, with more than 6,000 species distributed throughout most of the world. Belonging to the superfamily Papilionoidea, they are usually medium-sized to large butterflies. Most species have a red ...

. It is found in the north of North America from

Alaska Alaska ( ; russian: Аляска, Alyaska; ale, Alax̂sxax̂; ; ems, Alas'kaaq; Yup'ik: ''Alaskaq''; tli, Anáaski) is a state located in the Western United States on the northwest extremity of North America. A semi-exclave of the U.S., ...

, western

Yukon Yukon (; ; formerly called Yukon Territory and also referred to as the Yukon) is the smallest and westernmost of Canada's three territories. It also is the second-least populated province or territory in Canada, with a population of 43,964 as ...

, and east in the

Northwest Territories The Northwest Territories (abbreviated ''NT'' or ''NWT''; french: Territoires du Nord-Ouest, formerly ''North-Western Territory'' and ''North-West Territories'' and namely shortened as ''Northwest Territory'') is a federal territory of Canada. ...

as far as

Fort McPherson Fort McPherson was a U.S. Army military base located in Atlanta, Georgia, bordering the northern edge of the city of East Point, Georgia. It was the headquarters for the U.S. Army Installation Management Command, Southeast Region; the U.S. Ar ...

and

Tuktoyuktuk Tuktoyaktuk , or ''Tuktuyaaqtuuq'' (Inuvialuktun: ''it looks like a caribou''), is an Inuvialuit hamlet located in the Inuvik Region of the Northwest Territories, Canada, at the northern terminus of the Inuvik–Tuktoyaktuk Highway.Montgomery, ...

. The

wingspan The wingspan (or just span) of a bird or an airplane is the distance from one wingtip to the other wingtip. For example, the Boeing 777–200 has a wingspan of , and a wandering albatross (''Diomedea exulans'') caught in 1965 had a wingspan of ...

is 35–44 mm. Adults are on the wing from mid-June to late July.Four-dotted Alpine (''Erebia youngi'')
Butterflies of Canada

Subspecies

*''E. y. youngi'' (Yukon, Alaska) *''E. y. herscheli'' Leussler, 1935 (Yukon) *''E. y. rileyi'' dos Passos, 1947 (Alaska)

Similar species

Reddish alpine ''Erebia lafontainei'', the reddish alpine or Lafontaine's alpine, is a member of the subfamily Satyrinae of the family Nymphalidae. It is found in northern North America from Alaska, Yukon, and western Northwest Territories as far east as Tukt ...

(''E. lafontainei'') * Scree alpine (''E. anyuica'')

References

Four-dotted alpine Butterflies of North America {{Satyrini-stub