Elachista utonella

Alternative names
Bog Dwarf, Biselachista utonella

Wingspan 8 to 9 mm. Can be reliably separated from other similar Elachista species only by dissection of the genitalia.

Identification difficulty

Wet and boggy areas where sedges (especially Carex species) are found.

When to see it

July and August.

Life History

Larva mines the leaves of various sedges especially certain Carex species. The mines are usually visible from March to May.

UK Status

Widespread but uncommon. In the Butterfly Conservation's Microlepidoptera Report 2011 this species was classified as Nationally Scarce B.

VC55 Status

Rare in Leicestershire and Rutland, the record for 2013 being the first in VC55. 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