Rare resident.

Betula spp. with larva mining leaves from July to October in a brown, flat, bivalved case made from pieces cut from the margin of a leaf, overwintering in the final case attached to a birch twig, and not normally feeding again until the spring. Prefers small seedling or regenerating birch.

	Determination by Genitalia Examination (gen. det.) Required

Recorded in 16 (11%) of 140 10k Squares. First Recorded in 1979. Last Recorded in 2022. (Data up to end 2022) Additional Stats

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