Species Details

ABH: 28.014

BF: 642

Family: Oecophoridae

Subfamily: Oecophorinae

Taxon: Crassa unitella

Authority: (Hübner, 1796)

Vernacular: Brown Bark Moth

Account: Common wherever there are trees throughout southern England and Wales, north to Yorkshire. Only confusable with the rare and local Crassa tinctella, which see. Larva feeds on fungi growing on and under the dead bark of various deciduous trees.

Accounts provided by and used with the kind permission of Mike Wall, Hampshire County Moth Recorder. These will in due course be gradually replaced with species accounts with a Surrey context.

Wingspan: 13 — 17 mm

Surrey Flight Period: 27 May (2016) — 26 Aug (2024)

The flight period of overwintering adults are not given. See the flight chart below the distribution map.

Foodplant:

Foodplant accounts are from the HOSTS database — Natural History Museum, London, UK. (CC0).

Status: Common

UK BAP:

WCA:

Click here to view the full geology map of Surrey.

Verification Grade: 2 — Care needed to identify, an image may be required 🤔
Further Information: https://www.ukmoths.org.uk/species/crassa-unitella/
Statistics

* Based on adult records only.

Records: 207

Individuals: 110

Earliest Year: 1996

Latest Year: 2025

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