Wingspan 4-5 mm.
The eggs of this species are laid on either side of the leaves of one of the smooth-leaved willows. The yellow larvae emerge in June and September and create a narrow mine, often parallel to the rib of the leaf.
The adult moths emerge in two generations: in May and August.
The moth is widely distributed, but not particularly common in most of Britain.
Leafmine (British Leaf Mining Fauna)