70.236 (1915) September Thorn Ennomos erosaria ([Denis & Schiffermüller], 1775)

Status
Resident. Common.
UK BAP Priority Species.
 
Flight period
J F M A M J J A S O N D
























 
History
Lennon (1863) stated that it was not common, but that it had occurred at Lochaber (VC73).
 
Cunningham (1950) noted a record from Sir Arthur Duncan that was the first for Dumfriesshire, which he had trapped at Gilchristland (VC72) on 8th September 1932. Sir Arthur Duncan (1909-84) during his lifetime provided further records from Closeburn, Tynron and Castlehill, Dumfries (all VC72).
 
During the latter half of the 1970s it was regularly caught in the Rothamsted station at Gatehouse-of-Fleet (VC73) as it was with the Mabie Forest station (VC73) from 1985-1993. Trapping on the Hensol Estate (VC73) in the early 1980s found it to be common there as well.
 
From the latter half of the 1990s it was also trapped at Kirkton (VC72) and Cally Woods (VC73) and also in the early years of the 21st century. Other 21st century sites are Woodend, Torr Wood and Kirkconnell Flow NNR (VC73) and Durisdeer (VC72).
 
Life cycle
One generation. Overwinters as an egg on the foodplant. Larvae are present from May to early July, with pupation taking place between spun leaves.
 
Larval foodplants
Beech, birches, limes and oaks.
 
Identification
The orange-brown or fawn coloured wings, that are lightly speckled and the absence of a central crescent should separate it from other 'thorns.'
 
Habitat
Woodland. parkland and gardens.
 
Recorders' notes
Care is needed to separate from other 'thorns.'
© Alison Robertson, Bowhouse Park, 8 September 2011

Local distribution map

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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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