Species Details

ABH: 65.015

BF: 1660

Family: Drepanidae

Subfamily: Thyatirinae

Taxon: Polyploca ridens

Authority: (Fabricius, 1787)

Vernacular: Frosted Green

Account: Local in broad-leaved woodland, hedgerows and gardens throughout southern England and Wales. Larva feeds on Pedunculate and Sessile Oak, 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: 36 — 40 mm

Surrey Flight Period: 17 Mar (2024) — 21 May (2013)

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

Foodplant: Quercus sp. (an oak).

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

Status: Near Threatened (NT)

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/polyploca-ridens/

Statistics

* Based on adult records only.

Records: 580

Individuals: 1265

Earliest Year: 1888

Latest Year: 2025

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