Species Account

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Summary Data

Season (Adult / Immature):

National Status: Common

Local Status: Uncommon and thinly distributed resident.

Local Record: Grade 2   See here for explanation

Flight time: Two generations, May-Jun and Jul-Aug.

Forewing: 3.5-5.5mm.

Foodplant: Birch.

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 recorded188519931885
Year last recorded200920102010
Number of records4348182
Number of individuals5056212
Unique positions351396
Unique locations341190
Adult records2944146
Immature records4212

For the region, we have a total of 182 records from 90 sites. Earliest record on file is in 1885.


0437 Swammerdamia caesiella 02 adult (ex larva)
© Jenny Seawright
0437 Swammerdamia caesiella 01 larva on Betula
© Jenny Seawright

Species Account

For further information refer UK Moths.


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