Orange Underwing
Image: Ben Sale from Stevenage, UK (CC BY 2.0)
Common NameOrange Underwing
Scientific NameArchiearis parthenias
FamilyGeometridae
SubfamilyArchiearinae
Wingspan (mm)35
Wing Patternspotted
Primary Colorsorange, black, brown
HabitatBirch and aspen woodlands, forest edges, heathlands
Geographic RangeEurope, parts of Asia
Host Plantsbirch (Betula spp.), aspen (Populus tremula)
Flight PeriodMarch to April
Flight Styledarting
Conservation Statusleast-concern
Lifecycle NotesLarvae are green with white stripes, feeding on birch and aspen leaves. They pupate in a cocoon underground over winter.
Identification TipsEasily identified by its early spring flight, diurnal activity, and the striking orange hindwings contrasting with dark forewings. Often seen flying rapidly around birch trees.
Description
A medium-sized moth with dark, mottled brown forewings and vibrant orange hindwings featuring a prominent black border and central spot.
