Species Account

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Summary Data

Season (Adult / Immature):

National Status: Nb

Local Status: Scarce and local resident.

Local Record: Grade 3   See here for explanation

Flight time: Late May-early Jul.

Forewing: 10-13mm.

Foodplant: Wych Elm.

Regional breakdown:

Year first recorded1858187519042003
Year last recorded1904201420142004
Number of records396462
Number of individuals11503078
Unique positions34761
Unique locations24761
Adult records388462
Immature records0100

For the county, we have a total of 147 records from 56 sites. First recorded in 1858.


70.116 Blomer's Rivulet 04
© Terry Box
70.116 Blomer's Rivulet 03
© Damian Money
70.116 Blomer's Rivulet 02
© Charles Fletcher, 29 May 2002
70.116 Blomer's Rivulet 01
© Terry Box, 11 Jun 2010

Species Account

Sutton & Beaumont, 1989: Still regularly recorded from the north-east of the County, this species shows no sign of change in its distribution in Yorkshire although wych elm is disappearing from many sites (PQW pers. comm.). The future status of the moth is therefore uncertain.

Argus 47, 2001-04:
VC65. Magdalen Wood, 31.5.2003, 14.7.2004 (CHF, JCW, SPW). NEW VICE-COUNTY RECORD.

2012 (CHF): Local in the county. Since 1989 populations in the north-east have remained healthy and it is also now doing fairly well in the area around Ripon. Numbers may have dropped a little but it can still be locally quite common for example 82 trapped at Hackfall Woods on 9.7.2010. Sometimes disturbed in the daytime.

See background to species accounts.  Index of Vernacular names - Search - Random Species