| UK Status 
 Resident. Widespread but local throughout the British Isles.
 
 Montgomeryshire Status
 
 Recorded from a single site in the south of the county, Llangurig 1990.
 
 Wingspan
:
  M & F, 10.5-14mm.
 
 Confusion species
 
 It is often impossible to separate the adults of some species. In some cases differences can be seen in various life stages.
 
 | Flight time & Voltinity
(Univoltine) 
 Habitat
 
 Mainly heaths and alder carrs.
 
 Foodplant
 
 Birch and alder.
 
 Lifestage data
 
 Case-bearing/leaf miner. Eggs laid on leaf. Larva creates a series of
blotch mines from which it forms a case, the case is enlarged as the
larva grows. Pupates within case, attached to a twig.
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