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73.170 (BF2343a)

Lesser Common Rustic   

Mesapamea didyma
Adult: 4
Resident. Scarce.


Very similar to Common Rustic. No reliable external features have been found and examination of the genitalia is required to distinguish the two species.

Undissected specimens should be recorded as Common Rustic agg.(Mesapamea secalis agg.).

Recording Method.

Attracted to light, also comes to sugar and flowers.

Life cycle

One generation. Overwinters as a larva during September to May, feeding inside a stem and pupating in a cocoon underground.

Larval foodplants



A wide variety of grassland sites.


It wasn’t until 1983 that it was realised that there were two different species under M. secalis and so M. didyma was born.

The first confirmed record came in August 1987, when Bernard Skinner trapped it at Sandhead, Wigtownshire. Since then Tony Davis caught it and confirmed it at Torrs Warren (VC74) in August 1997, Fleet Forest, Gatehouse of Fleet and Wood of Cree (both VC73), all in August 1997.

31 record(s) from 15 hectad(s) in D&G

VC74 VC73 VC72
Last recorded 2011 2021 2021

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

 East Scotland Butterfly Conservation website - national distribution maps and phenology

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