70.233 (1912) August Thorn Ennomos quercinaria (Hufnagel, 1767)

Status
Resident. Rare.
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 Terregles (VC72). Gordon (1919) had only one record, which was of six specimens taken flying at dusk at Monreith (VC74) in late August 1895, by Lieutenant-Colonel A. E. Maxwell. One was caught at Gatehouse of Fleet, mid-August 1980 (RIS data), but there was a long wait before the next, which was trapped at Abbey Burn Foot (VC73) whilst surveying on the MOD land.
 
In 1999, there were two records, one from Cally Woods (VC73), with the other caught in a heath trap at Durisdeer (VC72). Cally Woods played host again in mid-September 2000, but we had to wait until 2009 for our next, when two came to light at Old Torr, Auchencairn (VC73), followed by our latest ever caught at Glenwhan Gardens, Dunragit on 3rd October 2010.
 
Life cycle
One generation. Overwinters as an egg. Pupates among leaves of the foodplants, mainly oaks.
 
Larval foodplants
Pedunculate Oak, limes and Small-leaved Elm.
 
Identification
Very similar to September Thorn, but this species holds it wings at a lower angle than other thorns when at rest. Also, outer cross-line on the forewing is kinked at the costa, with the inner one having a more pronounced angle at the costa.
 
Habitat
Woodland and parkland.
 
Recorders' notes
Great care is needed in identifying this very scarce species from other thorns. Quality picture or specimen required for record acceptance.
© Eddie Langrish, Glenwhan Gardens, 3 October 2010

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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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