
Appearance
The wingspan is 18–23 mm. The basal half of the forewings is silvery, while the distal half is brownish-grey. Adults are on wing in May and June in the north and from April to June in the southern part of the range. There is one generation per year.
Reproduction
The larvae feed on various trees, including "Pseudotsuga menziesii", "Abies lasiocarpa", "Abies balsamea", "Alnus", "Malus", "Betula papyrifera", "Acer", "Picea", "Larix laricina" and "Salix" species. The larvae have a yellowish-green body and green head. They reach a length of about 20 mm when full-grown. They can be found from May to early June and again from late July to October. The species overwinters in the larval stage.References:
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