Species Account

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Summary Data

Season (Adult / Immature):

National Status: Local

Local Status: Uncommon and thinly distributed or restricted resident.

Local Record: Grade 2   See here for explanation

Flight time: One generation, May-Jun.

Forewing: 16-19mm.

Foodplant: Broadleaved trees, especially 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 recorded195519861955
Year last recorded201120112011
Number of records33511692
Number of individuals541271136
Unique positions1164240
Unique locations954198
Adult records30211626
Immature records000

For the region, we have a total of 692 records from 198 sites. Earliest record on file is in 1955.


2281 Alder Moth 05
© Julian Francis
2281 Alder Moth 04
© Gillian Nash, 20 May 2016
2281 Alder Moth 03
© Will Bown
2281 Alder Moth 02
© Jamie McMillan
2281 Alder Moth 01
© Tom Morris

Species Account

For further information refer UK Moths.

Davey, P., 2009: A local species in England and Wales, the larva feeding on birch (Betula spp.), alder (Alnus glutinosa) and other deciduous tree species. In Dorset, the moth is generally at low density, but frequent locally along river valleys or in fens and swamps containing alder, and in old damp deciduous woodland on clay soils. Although it has been recorded from birch-rich localities, instances are surprisingly few from any single site considering birch is a quoted foodplant, and it does appear that alder is preferred by the moth, at least in the county. The following examples are possible partial second brood moths: Iwerne Minster, at MV light on 27 August 1967, 14 September 1967 (H Moore).

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