Hantsmoths

Local in woodland, heathland and scrubland throughout much of England and Wales; rare in Scotland and Ireland. Probably under-recorded in Hampshire and on the Isle of Wight, where the extent of known records correlate with those areas in which the recording effort is concentrated. Wingspan 6-8 mm. The adults emerge in May and are sometimes to be seen flying in numbers round the lower branches of oaks and over the surrounding undergrowth (MBGBI Vol 1). Adults are day-flying, and the species is more frequently recorded in the larval stage, when mines are relatively easy to find where they are present. Larva mines twigs and leaves of Oak, over-wintering as a pupa. The mines are described in the following link:
leafmines.co.uk
.