Mythimna decisissima
Scientific NameMythimna decisissima
FamilyNoctuidae
SubfamilyHadeninae
Wingspan (mm)32.5
Primary Colorslight brown, tan, white, dark brown
HabitatGrasslands, open woodlands, agricultural areas, wetlands
Geographic RangeEast Asia (Japan, Korea, China, Taiwan), Southeast Asia, parts of South Asia (India, Nepal)
Host Plantsvarious grasses
Flight PeriodMay to October (multiple generations)
Flight Stylefluttering
Conservation Statusleast-concern
Lifecycle NotesUndergoes complete metamorphosis; larvae are typically grass feeders, pupating in the soil or leaf litter.
Identification TipsKey features include the clear white longitudinal streak on the forewings, contrasting with the otherwise plain light brown coloration and subtle dark speckles.
Description
A medium-sized, light brown moth characterized by a prominent, slightly irregular white longitudinal streak on each forewing, often bordered by darker scales, and fine dark speckling across the wings.
