Square-spot rustic
Unlike most moths that pause over winter, its caterpillars keep feeding on grass roots and low plants right through the cold months without ever truly hibernating.
| Where | Woodland edges, waste ground, gardens |
|---|---|
| Size | 32 to 35 mm wingspan |
| When | August to October |
Forewings are reddish brown to grey with two pale, squarish marks that give the species its name, while the hindwings are plain grey with a whitish fringe.
Its caterpillars keep feeding on grasses and other low plants right through winter instead of pausing to hibernate, and the adults are frequent visitors to both light traps and sugar bait.
Traits
Habitat
Grassland
Colour
Brown, Grey
Active
Night
To people
Harmless
Activity through the year
Often confused with
The setaceous Hebrew character has a bright straw-colored triangular mark beside a bold black Hebrew-letter-shaped mark near the wingtip, a pattern the square-spot rustic lacks, and it runs slightly larger at 35 to 42 mm.
Questions
Is the Square-spot rustic dangerous to people?
The Square-spot rustic is harmless to people.
When can you see the Square-spot rustic?
The Square-spot rustic can be seen from August to October, at night.
Plate retouched from a photo by Rob Mitchell, CC0, Wikimedia Commons Licence
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Butterflies and moths›Owlet moths›Xestia
Last updated 2026-09-26. Every entry is checked against published sources.