UK Status
Resident. Found throughout the British Isles but more common in the western counties.
Montgomeryshire Status
Just a single old record from the west of the county at Cienws in 1980.
Wingspan
:
M & F, 8-9mm.
Confusion species
B. ulmella.
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Flight
time & Voltinity
(Univoltine)
Habitat
Open woodland, moorland, heathland and boggy areas.
Foodplant
Birch, hazel and sweet chestnut.
Lifestage data
Leaf miner. Eggs laid on underside of leaf. Larva mines narrow
contorted gallery then straighter, later eating a window on either side
of leaf. Pupates in a cocoon spun amongst detritus. |

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