Season (Adult / Immature):
National Status: Local
Local Status: Rare and very local resident.
Local Record: Grade 4 adult, 2 leaf-mine See here for explanation
Flight time: Jun-Jul.
|Year first recorded||1975||1987||2005|
|Year last recorded||2013||2011||2005|
|Number of records||6||3||1|
|Number of individuals||3||2||0|
For the county, we have a total of 10 records from 10 sites. First recorded in 1975.
Argus 50, 2005:
VC65. Hutton Conyers, mine on downy birch 21.9.2005 (CHF). NEW VICE-COUNTY RECORD.
2013 (CHF): Local amongst birch. We have no records from VC61 or 62. Adults fly around birches in sunshine in early summer but are rarely seen. Most of our records are of the characteristic leaf mine. The larva starts in a twig then when almost fully grown enter the petiole then the midrib of a leaf. It then creates a short corridor, usually in the basal part of the leaf, leading to an oval excision 3 x 5 mm in which the larva drops to the ground.