Species Account

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Summary Data

Season (Adult / Immature):

National Status: Migrant

Local Status: Scarce and local migrant/wanderer.

Local Record: Grade 3   See here for explanation

Flight time: Recorded late Jun-Oct.

Forewing: 16-19mm.

Foodplant: Scarlet Geranium and Yellow-rattle. others.

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 recorded189419871894
Year last recorded201120112011
Number of records796301652
Number of individuals2048474190
Unique positions997212
Unique locations807174
Adult records789301638
Immature records102

For the region, we have a total of 1652 records from 174 sites. Earliest record on file is in 1894.


2400 Scarce Bordered Straw 15
© Julian Francis
2400 Scarce Bordered Straw 14
© Julian Francis
2400 Scarce Bordered Straw 13
© Julian Francis
2400 Scarce Bordered Straw 12
© Julian Francis
2400 Scarce Bordered Straw 11
© Julian Francis
2400 Scarce Bordered Straw 10
© Martin Wood
2400 Scarce Bordered Straw 09
© Will Bown
2400 Scarce Bordered Straw 08
© Mike Hetherington, 20 August 2017
2400 Scarce Bordered Straw 07
© Paul Harris
2400 Scarce Bordered Straw 06
© Paul Harris
2400 Scarce Bordered Straw 05
© Gillian Nash
2400 Scarce Bordered Straw 04
© Paul Harris
2400 Scarce Bordered Straw 03 larva
© Martin Cade,
2400 Scarce Bordered Straw 02
© Tom Morris
2400 Scarce Bordered Straw 01
© Terry Box, 01 Sep 2006

Species Account

Similar species: 2403 Bordered Straw and the very rare 2404 Eastern Bordered Straw.

For further information refer UK Moths.

Davey, P., 2009: A regular immigrant species to southern Britain, most often recorded in southern coastal counties, and becoming progressively scarcer further north, the polyphagous larva feeding on wide variety of plants in the tropics and sub-tropics and in Britain occasionally found on imported fruits and cultivated flowers. In Dorset, records of this species date as far back as 1826, and its status is of a fairly regular, but often low-density immigrant whose total numbers vary annually between zero and one thousand. It has been recorded in twenty-five of the past twenty-seven years, and in every month apart from December, January and March. Many of those reaching the county are likely to have originated from sources south of 35 deg. N where the species is at least double-brooded. However in 2003 and more especially during 2006 it seems that the autumn brood comprised home-grown examples too following on from long hot immigrant-rich summers. Observations of individuals with pale straw-coloured forewings are few and denote a rapid life-cycle in high temperatures typically in desert conditions. A northward expansion of populations across Europe during the summer probably accounts for the steady increase in numbers as the year progresses, as it does for several other immigrant species. The only, old, record of a larva was one found in tomatoes imported from Portugal.

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