Brown Argus (Aricia agestis)

Male (Orange spots don't reach leading edge of forewing).
Male (Orange spots don't reach leading edge of forewing).
Female (Probably. Orange spots reach leading edge of forewing (just)).
Female (Probably. Orange spots reach leading edge of forewing (just)).
Brown Argus underside.
Brown Argus underside.
Female Common Blue underside. Note the extra forewing spot close to the body and also the smooth
Female Common Blue underside. Note the extra forewing spot close to the body and also the smooth "C-for Common"-shaped line of black spots on the hindwing which has an ugly break in it in the Brown Argus.
An extremely dark individual to add to the confusion, but the spots underneath confirmed it as a Brown Argus.
An extremely dark individual to add to the confusion, but the spots underneath confirmed it as a Brown Argus.
Occasionally there may be white spots on the forewings
Occasionally there may be white spots on the forewings
The egg is a textured disc with a central depression.
The egg is a textured disc with a central depression.
 
Information

NERC Act S41: Not listed
Local status: Locally common. Colonies exist all over the county.
Size: Small.
Larval foodplant: Common Rock-rose and various Crane's-bills
No. of broods: Two
Flight time(s): Early May to late June. Late July to mid September.
Winter: Fully-grown larva hibernates then pupates in the spring.
Habits: Sometimes roost communally on grasses. The feeding larvae are attended by ants.
Habitats: Brown-field sites, downland, unimproved grassland, heathland, road verges, track edges, woodland rides.
Distribution:

Normalized Weekly Abundance


Flight time graph


No. of Adults

Number of adults
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Number of 1km squares
No. of Records

Number of records
No. of Adults per record

Adults per record
Percentage of all adults

Percentage of all adults reported (of all species) in each year
Percentage of all records

Percentage of all butterfly records
No. of adults per 10,000 records

Number of adults in every 10,000 butterfly records (of all species)