Portland Ribbon Wave
Common NamePortland Ribbon Wave
Scientific NameIdaea dimidiata
FamilyGeometridae
SubfamilySterrhinae
Wingspan (mm)20
Primary Colorstan, light brown, reddish-brown, orange
HabitatWoodlands, gardens, hedgerows, open country
Geographic RangeEurope, North Africa, parts of Asia; introduced to Pacific Northwest of North America
Host Plantsdandelion, knotgrass, bedstraw, plantain, chickweed
Flight PeriodJune to August (sometimes a second brood in September)
Flight Stylefluttering
Conservation Statusleast-concern
Lifecycle NotesLarvae are slender, twig-like loopers that feed on low-growing plants and overwinter. Pupation occurs in a cocoon near the ground.
Identification TipsLook for its small size, pale brown coloration, the reddish-orange streak along the forewing costa, and the single dark discal spot on each forewing, along with subtle wavy cross-lines.
Description
A small, pale brown moth with a distinctive reddish-orange costal edge on the forewings, faint wavy lines, and a small dark discal spot on each wing.
