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7.015 ~ 0140 ~ Nematopogon swammerdamella ~ Large Long-horn
UK Status

Resident. Widely distributed and often common in mainland Britain.

Montgomeryshire Status

Fairly common, records from across the county.

Wingspan :   M & F, 17-21mm.

Confusion species

Care should be taken, all species of Nematopogon are very similar.
Flight time & Voltinity (Biennial)


Mainly a woodland species.


Dead leaves.

Lifestage data

Case-bearing. Eggs probably laid on the stems of herbaceous plants. Larva forms a portable case from which it will feed from soil particles or dead leaves. Pupa formed inside the case.
Montgomeryshire photos

Photo by PRW, 21st May 2009, Commins Coch