Local in woodland and heathland throughout the British Isles, more numerous in the north. In Hampshire fairly well-distributed, but less common on the Isle of Wight. Wingspan 12-16 mm. The main confusion species are
I. masculella and
I. oehlmanniella, but
I. pectinea is less distinctly marked. Larva mines leaves of Silver and Downy Birch, and Hazel, living within a movable case, subsequently feeding in fallen leaves, and over-wintering as a pupa.