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: May-Aug.

Forewing: 9-10mm.

Foodplant: Oak, 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 recorded183019971830
Year last recorded201020102010
Number of records7433214
Number of individuals10240284
Unique positions5511132
Unique locations488112
Adult records6632196
Immature records000

For the region, we have a total of 214 records from 112 sites. Earliest record on file is in 1830.


1433 Cryptoblabes bistriga 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 oak (Quercus spp.), birch (Betulua spp.) and alder (Alnus glutinosa). In Dorset, the moth is local among old oak/birch and oak/alder woodland where it is at low density; singletons have been noted where old oaks grow in open situations such as parkland, or along old field boundaries. Typical woodland sites where it may be found include Boys Wood, Powerstock Common, Oakers Wood, Castle Wood and Chase Woods. Although the moth is single brooded in June and July, the species has occasionally been recorded at light traps from late August and into September.

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