Species Account

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Summary Data

Season (Adult / Immature):

National Status: Local

Local Status: Rare and very local resident.

Local Record: Grade 4   See here for explanation

Flight time: Apr-early May.

Forewing: 6-8mm.

Foodplant: Hazel, Silver and Downy Birch.

Regional breakdown:

Year first recorded2002185918482008
Year last recorded2002200220142008
Number of records13171
Number of individuals621750
Unique positions13171
Unique locations13151
Adult records1151
Immature records0090

For the county, we have a total of 22 records from 20 sites. First recorded in 1848.


0129 Incurvaria pectinea 05 mines on birch
© Andy Nunn
0129 Incurvaria pectinea 04
© Dave Williamson
0129 Incurvaria pectinea 03
© Dave Williamson
0129 Incurvaria pectinea 02 larvae and mines
© Dave Shenton
0129 Incurvaria pectinea 01 male
© Charlie Streets, May 4th 2010.

Species Account

Sutton & Beaumont, 1989: Rather local and seldom common, recorded from vice-counties 61 to 64. Porritt (1907) gave it as 'common and widely distributed' but this does not seem to be the case now.

2013 (CHF): Local in the county with most records in the south. The majority of records are of larval cut-outs on birch leaves though this species also mines leaves of hornbeam, hazel, apple and sometimes other species. The larva starts making a short corridor which is followed and mostly overrun but a 4-5mm circular blotch. Often several mines are found in one leaf. An excision is made the same size as the blotch and the larva drops to the ground. Adults are similar to Incurvaria masculella but the forewing is a greyish brown and the head is also greyish-brown unlike the yellowish or reddish-brown head of masculella.

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