Great Oak Beauty
Common NameGreat Oak Beauty
Scientific NameBoarmia roboraria
FamilyGeometridae
SubfamilyEnnominae
Wingspan (mm)50
Wing Patterncryptic
Primary Colorsgrey, green, brown, black
HabitatOak woodlands, forests, parks, gardens
Geographic RangeEurope
Host PlantsQuercus
Flight PeriodJune to August
Flight Stylefluttering
Conservation Statusleast-concern
Lifecycle NotesThe larvae are twig-like caterpillars that feed on oak leaves. They overwinter as pupae in the soil or leaf litter, emerging as adults in early summer.
Identification TipsDistinguished by its relatively large size for a geometrid, broad wings, and highly cryptic bark-like pattern, often with faint darker cross-lines and a small discal spot on the forewings. Its strong association with oak trees is a key indicator.
Description
A medium-sized moth with broad, cryptically patterned wings, typically mottled in shades of grey, green, and brown, allowing it to blend seamlessly with tree bark or dead leaves.
