Japanese Treebrown
Common NameJapanese Treebrown
Scientific NameMycalesis francisca
FamilyNymphalidae
SubfamilySatyrinae
Wingspan (mm)45
Wing Patterneyespot
Primary Colorsbrown
HabitatForests, woodlands, bamboo thickets, and forest edges
Geographic RangeEast Asia (Japan, Korea, China, Taiwan)
Host Plantsvarious grasses, bamboo species
Flight PeriodMay to October (multiple broods)
Flight Stylefluttering
Conservation Statusleast-concern
Lifecycle NotesEggs are laid singly on host plant leaves. Larvae are green with a bifid tail and feed on grasses and bamboo. Pupation occurs as a chrysalis, typically suspended from a leaf or stem.
Identification TipsLook for the dull brown wings with a distinctive row of yellow-ringed black eyespots on the underside of both forewings and hindwings. The number and size of eyespots can vary seasonally.
Description
A medium-sized butterfly with a uniform dull brown coloration on both upper and underside. The underside features a series of prominent, ringed eyespots, particularly noticeable on the hindwings.
