Triangle
Common NameTriangle
Scientific NameMythimna pallens
FamilyNoctuidae
SubfamilyHadeninae
Wingspan (mm)35
Wing Patternsolid
Primary Colorsbrown, tan
HabitatDamp grasslands, fens, marshes, meadows, gardens
Geographic RangeEurope, North Africa, Asia, introduced to North America
Host Plantsvarious grasses (e.g., Poa, Festuca, Dactylis, Phragmites)
Flight PeriodMay to October
Flight Stylefluttering
Conservation Statusleast-concern
Lifecycle NotesLarvae are green or brownish, feeding on grasses at night and hiding during the day. Pupation occurs in the soil, and the species typically overwinters as a larva.
Identification TipsDistinguished by its uniform straw-brown forewings, lack of prominent markings, and characteristic triangular resting posture. It is generally paler and more uniformly colored than similar wainscot moths.
Description
A medium-sized moth with plain, straw-colored to light brown forewings, held in a distinctive triangular shape at rest, providing excellent camouflage.
