description Oak beauty Overview
The oak beauty (Biston strataria) is a moth species belonging to the family Geometridae, native to Europe and parts of Asia. The moth is named for its intricate black, white, and brown mottled wing pattern, which provides effective camouflage against oak bark where it typically rests. Adult oak beauties fly early in the year, generally from February to May, making them one of the earlier large moth species to appear in spring.
help Oak beauty FAQ
How can I identify an oak beauty moth?
Biston strataria has a mottled pattern of black, brown, cream, and white that resembles lichen-covered bark. It is a fairly large geometrid moth, and its broad wings show bold dark cross-lines rather than a single uniform brown tone.
When are adult oak beauty moths usually seen?
Adults are among the earlier large moths of the year and are generally encountered in spring. In Britain, they are often recorded from March into May, although weather and latitude affect the flight period.
Do oak beauty caterpillars feed only on oak trees?
Despite the common name, the larvae are not restricted to oak. They can feed on several deciduous trees and shrubs, including birch, alder, hazel, and willow.
Why is an oak beauty difficult to spot during the day?
Its broken black, white, and brown markings provide camouflage against tree bark and patches of lichen. Adults typically rest with their wings spread, making the outline and pattern blend into the surface beneath them.
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