Orange Underwing
Common NameOrange Underwing
Scientific NameArchiearis notha
FamilyGeometridae
SubfamilyArchiearinae
Wingspan (mm)35
Primary Colorsorange, black, grey, white
HabitatWoodlands, especially where Aspen and Poplar grow, clearings, and rides.
Geographic RangeEurope, across the Palearctic to Siberia, including parts of the UK.
Host PlantsPopulus tremula (Aspen), Populus (Poplar species)
Flight PeriodMarch to April
Conservation Statusleast-concern
Lifecycle NotesUnivoltine, with one generation per year. Eggs are laid on host plants, and the larvae, which are green with white stripes, feed on Poplar leaves. Pupation occurs in the soil over winter.
Identification TipsEasily identified by its bright orange hindwings with a distinct black border and central black spot, which contrast sharply with its mottled grey forewings. It is an early spring flyer, often seen on sunny days in woodland clearings.
Description
A medium-sized moth with cryptically patterned grey-brown forewings and striking bright orange hindwings featuring a broad black border and central black markings.
