Species Account

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Summary Data

Season (Adult / Immature):

National Status: Common

Local Status: Fairly common and thinly distributed very recent resident.

Local Record: Grade 2   See here for explanation

Flight time: At least two generations, mid Apr-May, Jul-Sep.

Forewing: 4mm.

Foodplant: Horse Chestnut.

IMPORTANT - Please note that the maps and accounts are provisional, subject to change and further update.  The whole dataset still needs to go through the final verification process and it is likely that a very small number of records will not satisfy the present requirements and there are other records that have not been formally submitted.  The information is for guidance only.

Record breakdown:

Year first recorded200620102006
Year last recorded201020102010
Number of records586128
Number of individuals136792752
Unique positions45294
Unique locations36276
Adult records15642
Immature records43086

For the region, we have a total of 128 records from 76 sites. Earliest record on file is in 2006.


0366a Cameraria ohridella 03
© Will Bown, May 2015
0366a Cameraria ohridella 02
© Tom Morris
0366a Cameraria ohridella 01 larval mines
© Terry Box

Species Account

For further information refer UK Moths.

Box, T.A., 2013: The Horse Chestnut Leaf-miner was first described from Macedonia as recently as the late 1970's and described as a new species of the genus Cameraria in 1986. It appeared in Austria in 1989 and since then has spread dramatically to the north and west across Europe at a rate of around 60km per year. First discovered in the UK in Wimbledon in July 2002, it had probably been present at least a year before due to being plentiful at the site, and has since spread throughout central England as far north a northern England.

The food-plant is the white-flowered Horse Chestnut, itself originally a native of the Balkans, and thought to be first introduced into Britain in the 1500s. Dispersal of the moth from infested areas occurs on a broad front through adult flight, assisted by the wind, and through the passive transport of adult moths or infested leaves in or on cars and other vehicles. Transportation by vehicles appears to be responsible for the sudden appearance of the moth in towns and cities a long way from known areas of infestation and it is often roadside trees on major routes where it is first noticed. The linear appearance of distribution is partly due to the fact that the tree is a popular roadside tree often forming avenues. The brown-galleried leaves from late summer are an increasingly distinctive site, care still needs to be taken as there is a similar looking fungus, but the presence of larvae would confirm. Although such prematurely brown-leaved trees can look distressing, the infestation appears not to harm the tree other than the fruit, ‘conkers’, do tend to be smaller than on unaffected trees.

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