
Brown-lined Looper
Common NameBrown-lined Looper
Scientific NameEulithis undulata
FamilyGeometridae
SubfamilyLarentiinae
Wingspan (mm)30
Wing Patternstriped
Primary Colorsbrown, tan, grey
HabitatWoodlands, forests, riparian areas, gardens
Geographic RangeNorth America, Europe, Asia (Holarctic)
Host Plantswillow, birch, alder, poplar
Flight PeriodJune to October
Flight Stylefluttering
Conservation Statusleast-concern
Lifecycle NotesLarvae are 'loopers' or 'inchworms' due to their distinctive locomotion, feeding on various deciduous trees and shrubs. They pupate in the soil or leaf litter.
Identification TipsKey features include the intricate pattern of wavy dark brown lines and bands, especially the prominent dark median band on the forewings. The overall mottled brown and tan coloration helps it blend into tree bark or leaf litter.
Description
A medium-sized moth with mottled brown and tan wings, characterized by prominent wavy dark brown lines and bands across both forewings and hindwings, providing excellent camouflage.



