Home The Butterflies of Gloucestershire Species Habitats Conservation


Gonepteryx rhamni
Male, 10 July 1976 Female, 1 August 1995


The Brimstone is a common species of woods, scrub and hedges where buckthorn bushes grow. Common Buckthorn (Rhamnus catharticus) is more common in the area than Alder Buckthorn (Frangula alnus).

Egg under Buckthorn leaf

Conservation Issues

Removal of hedgerows containing buckthorn would reduce the habitat.

Flight Period

Brimstones hibernate as adult butterflies, and in some years the new generation emerges in the summer whilst some of the previous generation still survive. Most of the overwintering butterflies have died out by mid June however, and the next generation is usually seen from about mid July until it goes into hibernation by about the end of August.

A particularly warm autumn or winter day may bring some Brimstones out of hibernation.


Throughout the area.