Mompha sturnipennella

Alternative names
Kentish Cosmet

Wingspan 13 to 18 mm. This momphid is superficially similar to the more widespread M. subbistrigella, differing from that species in its larger size and by the presence of distinct white costal streaks.

Identification difficulty

Areas where the larval foodplant, Rosebay Willowherb, is plentiful.

When to see it

The species flies in two generations, July to August and September to May, and can be seen flying around its foodplant in the sunshine.

Life History

The larvae feed on Rosebay Willowherb (Chamerion angustifolium). The first generation (May to June) can be identified by a gall (swelling) within the stem. The second generation in July and August feeds either in a seed pod with a small hole, or in a stem gall high up on the plant.

UK Status

The moth was first identified in Britain in 1950, and whilst most records are from southern England it seems to be spreading north. In the Butterfly Conservation's Microlepidoptera Report 2011 this species was classified as Nationally Scarce B.

VC55 Status

It appears to be uncommon in Leicestershire and Rutland, where there are few records. L&R Moth Group status = D (rare or rarely recorded).

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Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map