Alternate name: Greenland Sulphur
Family: Pieridae, Whites and Sulphurs view all from this family
Description The Northern Clouded Yellow or Hecla Sulphur (Colias hecla) is a butterfly in the Pieridae family. In Europe, it is found in the northern part of Norway, Sweden and Finland up to heights of 900 m. It is also found in Greenland, Alaska, the Northwest Territories, Yukon, Quebec, Labrador, Manitoba, the Chukot region, East Chukotka and the Far East.
The wingspan is 36-46 mm. The butterfly flies in June to August depending on the location.
The larvae feed on Astragalus species, including Astragalus frigidus and Astragalus alpinus as well as Trifolium repens.
Dimensions 1 3/8-1 7/8" (35-48 mm).
Habitat Arctic habitats.
Range Western Canada, Alaska, Eastern Canada.