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11.012 (BF186)

Common Sweep   

Psyche casta
Adult: 2
Larval Case: 1
Resident. Local.

Recording method

The larva lives in a case consisting of longitudinally-placed bits of grass stem and is often found attached to a tree trunk, foliage or a wooden fence.  Female is wingless.  Males come to light.

Life cycle

Larvae are present August-May, adults June-July.  Males emerge during the night; females emerge in the morning.

Larval foodplants

Grasses, lichens and decaying vegetation.


The first for Dumfries & Galloway was found at an unknown site in Kirkcudbrightshire by a person unknown prior to 1985 (BRC/MOGBI data), while the first for Wigtownshire was of a larva found at Garheugh on 26th June 2005 during a Scottish Entomologists’ gathering, with the Dumfriesshire first being of a case found at Longbridgemuir on 29th April 2014.

17 record(s) from 7 hectad(s) in D&G

VC74 VC73 VC72
Last recorded 2005 2022 2021

 UK Moths website - further information on species (with photos)

 East Scotland Butterfly Conservation website - national distribution maps and phenology

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