Appearance
The wingspan is 11–14 mm. Adults are light grey or dirty white with variable darker grey markings. They are on wing from late June to mid August.Adult: tiny (for a noctuid) long-winged light gray or dirty white moth with variable darker gray markings; forewing lines usually incomplete and marked by a series of dots; darker median shade often present; terminal area usually darker, and reniform spot usually marked by two dark dots; hindwing light brownish-gray, unmarked.
References:
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https://bugguide.net/node/view/199241