73.216 (2318) The Dun-bar Cosmia trapezina (Linnaeus, 1758)

Status
Resident. Common. 
 
Flight period
J F M A M J J A S O N D
























 
History
Somerville (1858) whilst on a visit to the Moffat area had found it was attracted to sugar in August of that year. Gordon (1913) stated that several were taken at sugar in a wood near Loch Elrig, Mochrum (VC74) by J. Garraway. William Evans (1916) received a male from Little Ross Lighthouse sometime in 1915 to aid his insect migration studies.
 
Sir Arthur Duncan (1909-84) had noted it at Closeburn, Tynron and Dumfries (all VC72) during his lifetime, while Russell (1944) had found it near Gatehouse of Fleet during 1942-43. Pelham-Clinton also recorded it during the early 1960s with records from Palnackie and Rockcliffe (VC73). The only other record in the 60s was in 1969 at Clatteringshaws Loch.
 
From then on it appeared regularly at all seven of the Rothamsted stations thus greatly adding to our knowledge of the species. There have been many nights with counts of 14, 15, 16, found in a single light trap at the regular trapped sites of Kirkton, Durisdeer, Cally Woods and Mersehead RSPB.
 
Life cycle
One generation. Overwinters as an egg. Larvae are present during April to late June, with pupation taking place in a cocoon close to the ground.
 
Larval foodplants
Larvae feed on most broadleaved trees and shrubs, with the larger larvae being cannabalistic and feeding on other smaller larvae.
 
Identification
Unmistakeable with the basal cross-line forming a V to separate it from the Angle-barred Sallow.
 
Habitat
Most sites with trees or shrubs, but most abundant in woodland.
© Stephen Riddell, Maxwelton Mains, 25 July 2014

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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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