Species Account

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Summary Data

Season (Adult / Immature):

National Status: Local

Local Status: Fairly common but restricted resident.

Local Record: Grade 3   See here for explanation

Flight time: Late May-early Jul.

Forewing: 10-12mm.

Foodplant: Ivy and Knot-grass.

IMPORTANT - Please note that the maps and accounts are provisional, subject to change and further update.  The whole dataset still needs to go through the final verification process and it is likely that a very small number of records will not satisfy the present requirements and there are other records that have not been formally submitted.  The information is for guidance only.

Record breakdown:

Year first recorded195519731955
Year last recorded201120112011
Number of records972842112
Number of individuals18511333968
Unique positions15010320
Unique locations13011282
Adult records937832040
Immature records000

For the region, we have a total of 2112 records from 282 sites. Earliest record on file is in 1955.


1711 Treble Brown Spot 03
© Martin Wood
1711 Treble Brown Spot 02
© Dave Foot
1711 Treble Brown Spot 01
© Tom Morris

Species Account

For further information refer UK Moths.

Davey, P., 2009: A species restricted to southern England and south Wales, the larva likely to be polyphagous. In Dorset, the moth occurs in two rather different habitats. The first is oak woodland where it is locally common and the second is in suburban environments where it is regularly encountered but at low density. Elsewhere, it occurs infrequently. In addition to the dominant single mid-June to mid-July brood, a partial bivoltine cycle is suspected with a number of records in May and in August. The national norm is a single brood between mid-June and mid-July, followed by a partial second brood in late July and August. In southern Europe, the moth is bivoltine.

See background to species accounts.  Index of Vernacular names - Search - Random Species