70.121 (1789) Scallop Shell Hydria undulata (Linnaeus, 1758)

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
























 
History
Lennon (1863) stated that it was very rare, but that it had occurred at Riggfoot and on the Tinwald Downs (both VC72), and the following year had also found it at Dalskairth (VC73).
 
Sir Arthur Duncan (1909-84) during his lifetime had found it on Kirkconnell Flow (VC73).
 
In 1974 a single was recorded from the Rothamsted station at Gatehouse of Fleet, as was one in 1977 at the Bridge of Dee site. Further RIS records came from Mabie Forest, when two were recorded in 1985 and a single in 1993.
 
When the Scottish Entomnologists' meeting was held at Barony College IN 1982, one was trapped there, with another that year on the Hensol Estate.
 
From 1994 to 2010 there were twenty-six records, mainly from Kirkconnell Flow NNR. There were two records in Wigtownshire, from a Newton Stewart garden and from Forest Moor, otherwise the rest were evenly split from the other two Vcs.
 
Life cycle
One generation. Overwinters as a pupa, in a cocoon in earth. Larvae are present August and September.
 
Larval foodplants
Aspen, Bilberry and sallows.
 
Identification
Unmistakeable.
 
Habitat
Damp woodland and sallow scrub.
© Richard Mearns, 1996

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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