Mine of Bucculatrix demaryella on Betula pubscens Image: Willem Ellis (Bladmineerders van Europa)

Leaf-mine: The larva begins with a short, full depth corridor, often along the midrib or a thick vein. Most of the mine with a thick frass line. The larva soon leaves the mine, and starts causing window-feeding, later eating holes in the leaf. The larval chamber (the space occuped by the larva, while in the mine, obviously free of frass) is more than three times as long as wide (Bladmineerders van Europa).The mine is also illustrated in British leafminers.

Larva: The mining larva is pale yellow with a darker head (the free living larva is grey green) (Bladmineerders van Europa).

Pupa: Details unknown.

Adult: Not illustrated in UKMoths (check for update). The male and female genitalia are illustrated by the Lepidoptera Dissection Group.

Hosts in Britain:

Hosts elsewhere:

Time of year - larvae: October (British leafminers).

Time of year - adults: Unknown.

Distribution in Great Britain and Ireland: Widespread in Britain inclduing East Sutherland (Achany) (British leafminers); Caernarvonshire, Derbyshire, East Kent, East Ross, East Suffolk, East Sutherland, Glamorgan, Herefordshire, Kincardine, Merionethshire, North Aberdeen, North Devon, North Ebudes, North Essex, Shropshire, South Aberdeen, South Lancaster, Stafford, West Gloucestershire, West Suffolk and Worcestershire (NBN Gateway, includes Watsonian Vice Counties having records that fall within or overlap the vice county border at 10km resolution or better). See also British leafminers distribution map.

Also recorded in the Republic of Ireland (Karsholt and van Nieukerken in Fauna Europaea).

NBN Grid map: Note that not all datasets on the NBN Gateway may be available on the map below. If you are an NBN Gateway registered user you can request access for missing datasets via the link 'Open interactive map in new window' below.

Distribution elsewhere: Widespread in continental Europe including Austria, Belarus, Belgium, Croatia, Czech Republic, Danish mainland, Estonia, Finland, French mainland, Germany, Hungary, Italian mainland, Latvia, Lithuania, Macedonia, Norwegian mainland, Poland, Russia - Central, East and Northwest, Slovakia, Sweden, Switzerland, The Netherlands, Ukraine and Yugoslavia (Karsholt and van Nieukerken in Fauna Europaea).

NBN interactive distribution map(s) of known host species in Great Britain and Ireland and elsewhere:

Parasitoids in Britain and elsewhere: Unknown.