Species Account

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Summary Data

Season (Adult / Immature):

National Status: Common

Local Status: Uncommon and thinly distributed or restricted resident.

Local Record: Grade 2   See here for explanation

Flight time: Jun-Aug.

Forewing: 9-12mm.

Foodplant: Duckweed.

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 recorded181819941818
Year last recorded201020102010
Number of records9638268
Number of individuals11094408
Unique positions5916150
Unique locations5613138
Adult records8836248
Immature records000

For the region, we have a total of 268 records from 138 sites. Earliest record on file is in 1818.


1354 Cataclysta lemnata (Small China-mark) female 03
© Gillian Nash, August 2017
1354 Cataclysta lemnata (Small China-mark) 02
© Jean Southworth, 20 Jul 2012
1354 Cataclysta lemnata (Small China-mark) 01 female
© Tom Morris

Species Account

For further information refer UK Moths.

Davey, P., 2009: A species of stagnant water habitat in England, Wales and southern Scotland, the larva feeding on duckweeds (Lemna spp.). In Dorset, the moth is very local, colonising ponds at Hengistbury Head, Eastern Lake on Studland Heath, open freshwater reedbed at Lodmoor, and water meadows at Wareham. The national norm is for a single brood between June and August, but a bivoltine cycle is suspected in Dorset, with moths on the wing over a three-month period; the species is double-brooded on the continent. The moth regularly disperses over short to medium distances. The following light trap records refer: Walditch, on 18 July 2003 (M Parsons), West Bexington, on 18 August 1994 (R Eden), Portland, on 27 July 1994, 25 August 2001, 10 and 23 August 2003 (M Cade), Freshwater Bay, on 23 August 2003 (J Chainey).

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