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4.077 ~ 0043 ~ Fomoria weaveri ~ Cowberry Pigmy
UK Status

Resident. Can be a common species where the foodplant is found in Wales and from Staffordshire northwards.

Montgomeryshire Status

First discovered in the far north of the county in the Berwyns, 2014.

Wingspan :   M & F 6-8mm.

Confusion species

Many species of Stigmella are similar. One of the best ways of separating them is to examine the leaf-mine in the foodplant.
Flight time & Voltinity (Univoltine)


Moorland and mountains.



Lifestage data

Leaf miner. Eggs laid on underside of leaf. Larva forms a long slender gallery, later forming a blotch. Pupates in blotch.
Montgomeryshire photos

Photo by ANG, 26th March 2014, Berwyns