| UK Status 
 Resident. Common N.
 
 Montgomeryshire
Status
 
 A fairly common species throughout the county.
 
 Wingspan
:  M
& F, 39-44mm.
 
 Confusion
species
 
 Poplar Lutestring.
 | Flight
time (Montgomeryshire) 
 Habitat
 
 Woodland, heathland and moorland.
 
 Foodplant
 
 Silver birch and downy birch.
 
 Lifestage data
 
 Larva mid May-mid July which hide during the day in-between
spun leaves. Overwinters as a pupa in a cocoon formed in the leaf
litter.
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