Species Account

Select species and region:



Summary Data

Season (Adult / Immature):

National Status: Common

Local Status: Uncommon and fairly widespread resident.

Local Record: Grade 1   See here for explanation

Flight time: Two generations, May-Jun, Aug-Sep.

Forewing: 16-20mm.

Foodplant: Herbaceous and woody plants.

Regional breakdown:

Year first recorded19291953188318831883
Year last recorded20142014201420142015
Number of records16116340175968
Number of individuals115160450123781
Unique positions476512817328
Unique locations466512617327
Adult records14314934770960
Immature records019122

For the county, we have a total of 1552 records from 437 sites. First recorded in 1883.


73.045 Knot Grass 09 larva
© Colin Duke All Rights Reserved 2018
73.045 Knot Grass 08
© Colin Duke All Rights Reserved 2018
73.045 Knot Grass 07 Head
© Colin Duke All Rights Reserved 2018
73.045 Knot Grass 06
© Colin Duke All Rights Reserved 2018
73.045 Knot Grass 05
© Andy Nunn
73.045 Knot Grass 04 larva
© Charlie Streets, 23 Sep 2012
73.045 Knot Grass 03
© Damian Money
73.045 Knot Grass 02
© Charles Fletcher, 22 Jun 2007
73.045 Knot Grass 01
© Terry Box, 29 May 2011

Species Account

Sutton & Beaumont, 1989: Probably widespread and frequent in all five vice-counties. However, this is a species which comes to sugar more readily than light and records are rather few in VC61 and VC65. Only reported as common at Harmby, VC65 (FBS) and Sheffield, VC63, where Garland (1979) states it to be abundant in gardens.

2012 (CHF): Widespread and fairly common across the county, particularly in upland areas in the west and the north-east. Numbers and distribution have not altered recently. This species has two broods to the south of us but there is little evidence of this happening in Yorkshire yet.

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