Species Account

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Summary Data

Season (Adult / Immature):

National Status: Common

Local Status: Scarce and local resident. Under-recorded - treated as agg.

Local Record: Grade G   See here for explanation

Flight time: One generation, Oct-Nov.

Forewing: 16-20mm.

Foodplant: Birch and Alder.

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 recorded195619851956
Year last recorded201120112011
Number of records9070320
Number of individuals5732291604
Unique positions31674
Unique locations31776
Adult records8970318
Immature records000

For the region, we have a total of 320 records from 76 sites. Earliest record on file is in 1956.


1797 Autumnal Moth 01 female
© Kate McCusker

Species Account

Similar species: 1798 Small Autumnal Moth.

For further information refer UK Moths.

Davey, P., 2009: Widespread in Britain, the larva feeding on birch (Betula spp.) and alder (Alnus spp.). The shape of the post-median fascia on the forewing forms a right angle where it curves around the discal spot. In Dorset, the moth is likely to be most common in deciduous woodland on wetland and heathland sites.

See background to species accounts.  Index of Vernacular names - Search - Random Species