70.266 (1942) Dotted Carpet Alcis jubata (Thunberg, 1788)

Resident. Local.
Flight period

Somerville (1858) during a visit to the Moffat area had found it on lichens on birch during August. Sir Arthur Duncan (1909-84) during his lifetime had found it at Closeburn, Tynron and Castlehill, Dumfries (all VC72). Russell (1944) while staying at Gatehouse of Fleet (VC73) during 1942-43 had found it locally.
It was not recorded then until the early 1970s when T. J. Radford came in 1971 and found it at Mochrum Loch, Wigtownshire, and again in 1974 where he stayed the night with his children just inside a large wood near Ecclefechan (VC72). It was very damp, with lush vegetation caused by the heavy rainfall. The light brought in 44 species including Alcis jubata.
During 1974-91 five of the Rothamsted stations recorded it moderately, Penninghame and Caerlaverock not finding it. From 1992 to 2010 there were eight records, with fifty coming from Cally Woods (VC73). The rest of those records came from various sites in VCs 72 and 73. The only other record from Wigtownshire came from Torrs Warren in 1997. At Ken-Dee Marshes Reserve one was trapped on 25th August 2011, while, the only one in 2012 was trapped at Glencaple on 10th August.
Life cycle
One generation. Overwinters as a larva during late August to June. Pupation takes place among the foodplant.
Larval foodplants
Larvae feed on beard lichens.
Compare with Grey Birch, but the generally white forewing colour with conspicuous central black-dots and fine outer cross-line angled at both ends should separate it from that species.
Found in mature broadleaved woodland.
© Alison Robertson, Ken-Dee Marshes, 25 August 2011

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  • Butterfly Conservation - Macro-moth provisional distribution for the British Isles (excluding the Republic of Ireland) from the National Moth Recording Scheme
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