Butterflies - Brown Argus (Aricia agestis)
The brown Argus and female Common Blue are very similar in appearance. The Brown Argus lacks the two extra spots on the underside of the forewing which are present on the Common Blue.
Flying low to the ground, the Brown Argus has a silvery appearance, frequently stopping to perch or feed on flowers.
The Brown Argus has chocolate brown wings with orange spots near the edge and fringed with white. There is a black spot in the centre of the upper wing. The undersides of the wings are grey/brown with white ringed black spots and orange markings.
The males and females are similar although the sexes can be distinguished by the orange spots. These spots clearly extend to the leading edge of the forewing in the females, while in the males, the spots are very pale or absent at this point.
Brown Argus butterflies will often roost communally in sheltered areas although this species is rarely seen in large numbers... usually only one or two individuals are encountered at a site at any one time.
- Larval Food Plants
- Key Sites
Dove's-foot Crane's-bill (Geranium molle)
Common Stork's-bill (Erodium cicutarium)
The Brown Argus larvae may also feed on Cut-leaved Crane's-bill (Geranium dissectum), Meadow Crane's-bill (Geranium pratense), and Hedgerow Crane's-bill (Geranium pyrenaicum).
In Warwickshire, the Brown Argus occurs in small numbers on a range of habitats including woodland clearings, heath land, disused railway lines, road verges, and set-aside fields.
Resident in Warwickshire.
Ashlawn Cutting (WWT Reserve)
A photographic slideshow displaying various images of the Brown Argus is currently in development.
Details of how you can supply your own photographs for display here will be made available soon.
The flight chart below is based on observations of the adult Brown Argus butterfly in Warwickshire between 2005 and 2008. Peak periods are shown in dark green.