Species Details

ABH: 70.222

BF: 1902

Family: Geometridae

Subfamily: Ennominae

Taxon: Petrophora chlorosata

Authority: (Scopoli, 1763)

Vernacular: Brown Silver-line

Account: Common wherever there is bracken, in woodland, heathland and moorland throughout much of the British Isles Fairly unmistakable. Larva feeds on Bracken, over-wintering as a pupa.

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: 31 — 37 mm

Surrey Flight Period: 16 Apr (1959) — 16 Sep (2025)

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

Foodplant: Pteridium aquilinum (Bracken).

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

Status: Least Concern (LC)

UK BAP:

WCA:

Click here to view the full geology map of Surrey.

Verification Grade: 1 — Relatively easily identified 👌

Further Information: https://www.ukmoths.org.uk/species/petrophora-chlorosata/

Statistics

* Based on adult records only.

Records: 939

Individuals: 1552

Earliest Year: 1903

Latest Year: 2025

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