Species Details

ABH: 70.011

BF: 1708

Family: Geometridae

Subfamily: Sterrhinae

Taxon: Idaea dimidiata

Authority: (Hufnagel, 1767)

Vernacular: Single-dotted Wave

Account: Common in woodland, hedgerows, gardens, fens, marshes and river-banks throughout the British Isles, but absent from the north of Scotland. Confusion species include Treble Brown Spot I. trigeminata. Larva feeds on Cow Parsley, Burnet-saxifrage and Hedge Bedstraw.

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: 17 — 22 mm

Surrey Flight Period: 7 Jun (1970) — 29 Sep (1988)

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

Foodplant: Anthriscus sp., Pimpinella sp.

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

* Based on adult records only.

Records: 941

Individuals: 1207

Earliest Year: 1899

Latest Year: 2025

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