73.350 (2137) Great Brocade Eurois occulta (Linnaeus, 1758)

Resident? Immigrant? Scarce.
Flight period

Gordon (1913) found it to be rare, although he had taken it at sugar in a wood at Corsemalzie on 14th August 1897. W. S. Brocklehurst informed Gordon that he had taken two at sugar at Park Place, Glenluce (VC74) on 12th August 1910. Sir Arthur Duncan (1909-84) during his lifetime had found it at  Tynron (VC72). Archibald Russell (1944) listed it as occurring near Gatehouse of Fleet (VC73) during the years 1942-43.
During 1976-77 there were four Rothamsted records: singularly at Gatehouse of Fleet and Waterside Mains, with two records from the Bridge of Dee station. Then, 1981-83 a handful were trapped on the Hensol Estate (VC73).
The next was twelve years later in 1995 and was trapped at Kirkton. From 1996 to 2010 it was trapped at Drumlanrig, Knowtop Lochs, Cally Woods, Auchencairn, Bennan in Glentrool, Carsfad, near Dalry, Bennan Hill near Mossdale, Mersehead RSPB and Low Cordorcan. There are no Wigtownshire records since 1910.
Life cycle
One generation. Overwinters as a larva, during September to June. Pupation takes place under moss or plant debris without a cocoon.
Larval foodplants
Mainly Bog-myrtle, but also other herbaceous plants.
The narrow forewing which is relatively long and coloured greyish-blackish has a heavy black streak basally which should aid identity. The blacker individuals are resident, whilst the paler ones are immigrants.
Boggy areas in scrubby moorland, broadleaved woodland and pine forests.
Recorders' notes
Ratcliffe (2007) p. 279, says "Has been found around New Galloway and the Mearns' regard it as a resident breeder, rather than an immigrant."
© Keith Naylor, Mersehead RSPB, 18 August 2006
© Keith Naylor, Loch Urr, 29 July 2011

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Distribution map displays records from the National Biodiversity Network (See terms and conditions).

The following datasets are included:

  • 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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