Season (Adult / Immature):
National Status: Common
Local Status: Common and thinly distributed or restricted resident.
Local Record: Grade 2 leaf-mine See here for explanation
Flight time: May-mid Jun.
|Year first recorded||1904||1859||1883||1883||1883|
|Year last recorded||2014||2014||2014||2014||2013|
|Number of records||12||30||99||43||9|
|Number of individuals||14||20||400||7||0|
For the county, we have a total of 193 records from 163 sites. First recorded in 1859.
Most records are of leaf-mines.
Sutton & Beaumont, 1989: Widespread and usually common to abundant, recorded from all five vice-counties.
2013 (CHF):A very common and distinctive leaf mine which is not likely to be confused with any other species mining on birch. The mine is a roundish, often almost circular, primary, upper-surface blotch without a trace of an initial corridor. There are often several mines in leaf. The mine has a conspicuous dark centre, where the larva often retreats. Young mines consist of only the dark centre, without the light periphery.