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
|Year first recorded||1976||2001||1976|
|Year last recorded||1984||2014||1983|
|Number of records||2||6||2|
|Number of individuals||2||4||2|
For the county, we have a total of 10 records from 9 sites. First recorded in 1976.
2013 (CHF):The birch-feeding Stigmella species can at times be difficult to identify. This species may be commoner in the county than records suggest as identification is not always easy. Records are acceptable if absolutely typical but should be accompanied by a specimen or photo unless you are experienced with this species. The egg is laid on the underside of the leaf, often in a vein axil. The mine is a slender, little widening corridor. Its first part is strongly contorted; the leaf tissue that is cut off thereby is killed, usually resulting in a brown spot. The remainder of the corridor in contrast is very little contorted, often remarkably straight, when it runs alongside a vein. The corridor is almost completely filled with coiled frass that is green when fresh. The mine may be difficult to locate initially but becomes brown with age.