Agonopterix alstromeriana

Alternative names
Brown-spot Flat-body

Wingspan 17-20 mm. Fairly unmistakable combination of large black costal blotch with adjacent rusty red elongate mark and prominent apical dots.

Identification difficulty

Areas where foodplant (Hemlock) is found including roadsides, waste ground, marshes and river sides.

When to see it

August to April.

Life History

The larvae feed on the flowers and leaves of Hemlock (Conium maculatum) between May and July.

UK Status

Reasonably common over most of the British Isles. In the Butterfly Conservation’s Microlepidoptera Report 2011 this species was classified as common.

VC55 Status

Fairly frequent but not common in Leicestershire and Rutland. L&R Moth Group status = B (scarce resident or restricted distribution or regular migrant)

32.031 BF695

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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