Grass-spinner: The larva spins grass blades and feeds inside the spiral spinning,
causing whitening of the grass blade tip. It changes leaves several
times in the course of its development (British
Larva: The larvae of moths have a head capsule and chewing mouthparts with opposable mandibles (see video of a gracillarid larva feeding), six thoracic legs and abdominal legs (see examples).
The striking black and white striped larva is described and
illustrated in British
leafminers and UKMoths.
Pupa: The pupae of moths have visible head appendages, wings and legs which lie in sheaths (see examples).
The adult is illustrated in UKMoths and the Encyclopedia
of Life. The male
and female genitalia are illustrated by the Lepidoptera Dissection Group.
Hosts in Great Britain & Ireland:
elsewhere: Currently unknown.
of year - larvae: April-July (British
of year - adults: The nocturnal adults fly between June and
in Great Britain & Ireland: Occurring in England and Wales
including Bedfordshire (VC30), Caernarvonshire (VC49), Cambridgeshire (VC29), Cheshire (VC58),
Derbyshire (VC57), Dorset (VC9), East Cornwall (VC2), East Gloucestershire (VC33), East Kent (VC15),
East Norfolk (VC27), East Suffolk (VC25), Glamorganshire (VC41), Herefordshire (VC36), Merionethshire (VC48),
Middlesex (VC21), North Essex (VC19), North Hampshire (VC12), North Lincolnshire (VC54), North Somerset (VC6), North Wiltshire (VC7), Shropshire (VC40), South Devon (VC3), South Essex (VC18),
South Hampshire (VC11), South Lancashire (VC59), South Somerset (VC5), South Wiltshire (VC8),
Staffordshire (VC39), Surrey (VC17), Warwickshire (VC38), West Cornwall (VC1), West Gloucestershire (VC34),
West Kent (VC16), West Norfolk (VC28), West Suffolk (VC26), Westmorland (VC69) and Worcestershire (VC37) (NBN
Gateway) and the Channel Is. (Karsholt and van Nieukerken
in Fauna Europaea).
recorded in Republic of Ireland (UKMoths;
Karsholt and van Nieukerken in Fauna Europaea). See also Ireland's NBDC interactive map.
NBN Grid Map:
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elsewhere: Widespread in continental Europe including Austria,
Belarus, Belgium, Czech Republic, Danish mainland, Estonia, Finland,
French mainland, Germany, Greek mainland, Hungary, Italian mainland,
Latvia, Liechtenstein, Lithuania, Luxembourg, Norwegian mainland,
Poland, Romania, Russia - Central, East and North, Slovakia, Spanish
mainland, Sweden, Switzerland, The Netherlands and Ukraine (Karsholt
and van Nieukerken in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British and Irish Parasitoids in Britain and elsewhere: Currently unknown.