(Linnaeus, 1761)Wingspan 11-14 mm.
This is probably the commonest species of British Coleophorid, and is found throughout the British Isles wherever its foodplants grow.
The adult, which appears in June, resembles several other grey-brown Coleophora species. The indistinct rings near the tip of the antenna distinguish it from some of them, but examination of the genitalia is advised for positive identification of non-reared specimens.
The larva feeds by inserting its head into small mines it creates on the leaves of birch (Betula), elm (Ulmus), alder (Alnus), or hazel (Corylus). Occasionally it is found feeding on other trees, or on herbaceous plants onto which it has accidentally fallen.
Pupation, June - early July, is in the larval case fixed to the upper surface of a leaf in a sunny situation. Sometimes pupation is on plants other than those fed on.
For larval details, please click 'show detail', below