Species Account

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Summary Data

Season (Adult / Immature):

National Status: Local

Local Status: Scarce and local resident.

Local Record: Grade G   See here for explanation

Flight time:



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 recorded197019831970
Year last recorded201120102011
Number of records29230644
Number of individuals560871294
Unique positions587130
Unique locations506112
Adult records28430628
Immature records306

For the region, we have a total of 644 records from 112 sites. Earliest record on file is in 1970.


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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.), sallow (Salix spp.), larch (Larix spp.), beech (Fagus spp.), and various other deciduous tree and shrub species. In Dorset, the moth is local and tends to be confined to deciduous woodland containing birch and sallow in the eastern half of the county. Debate surrounds the possibility that this species is merely a form of the Engrailed1947, indeed Ectropis crepuscularia is not recognised as a distinct species on the Continent. Structurally there is no difference between the two, but externally, the ground colour is usually much whiter in this species.

Hill, L., 2014: Ectropis crepuscularia ([D. & S.]) is now considered a valid European species; E. bistortata (Goeze) is relegated to a specific synonym of E. crepuscularia ([D. & S.]) (Agassiz et al, 2013). The species that we call E. crepuscularia appears to be endemic to Britain. Agassiz (2003) informs us, however, that the name crepuscularia was first assigned to a moth caught in Vienna and so that must, of course apply to the European species. Thus, our E. bistortata (Goeze) is really E. crepuscularia ([D. & S.]) and our crepuscularia is in need of a valid new name! (Plant, 2008)

Agassiz, D.J.L. 2003. The names of Engrailed moths (Geometridae). Entomologist’s Rec. J. Var. 115: 223.

Agassiz, D.J.L., Bevan, S.D. & Heckford, R.J. 2013. Checklist of the Lepidoptera of the British Isles.

Plant, C.W. 2008. The Moths of Hertfordshire. The history, status, distribution and phenology of the micro-
       and macro-lepidoptera of a south-eastern English county. Hertfordshire Natural History Society. 373.

Last updated: 10 January 2014


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