Photo left courtesy Ian Vickery, Brewton, Alabama, August
Identification: Covell, Moths of Eastern North America,
Females of the species can be identified only by association
with known males. The forewing is usually grayer in males and
the median area is paler. There will be a blackish patch near
the apex, with faint streaks below it. The white marks accent
the lower sub-terminal line. Generally, the moth will be dark
grayish-brown with sharp markings in the upper sub-terminal area.
The sub-terminal line is almost black and will have a white spot
near the bottom inner margin, as well as a whitish spot on the
costal margin just above the line. The caterpillar host plants
are alder, apple, birch and fir.
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