Phyllonorycter nicellii is a moth of the family Gracillariidae. It is found in most of Europe, except the Balkan Peninsula and the Mediterranean islands.
The wingspan is 7–8 mm The forewings are shining golden-ochreous, sometimes suffused with brown ; base pale ; a fascia at 1/4, another in middle, three posterior costal and two dorsal wedge-shaped spots shining whitish, anteriorly blackish-margined, first pair of spots often connected ; an oval blackish apical spot. Hindwings are grey.[1]
and the moths are on wing in May and August in two generations.
The larvae feed on Corylus avellana and Corylus colurna mining the leaves of the host.