White-letter Hairstreak (Satyrium w-album)

Underside. Never settles with wings open. Sexes are similar but the tails on the hindwings of the females are said to be slightly longer.
Underside. Never settles with wings open. Sexes are similar but the tails on the hindwings of the females are said to be slightly longer.
To warm up, turns underside to be at right-angles to the sun.
To warm up, turns underside to be at right-angles to the sun.
A pair mating.
A pair mating.
Convergence on a late season thistle
Convergence on a late season thistle
Larva
Larva
Larva
Larva
Pupa
Pupa
Pupa
Pupa
 
Information

Law: Protection under the Wildlife and Countryside Act 1981.
NERC Act S41: Species of Principal Importance
Local status: Uncommon. Lives in small colonies.
Probably under-recorded.
Size: Small.
Larval foodplant: English Elm and Wych Elm.
No. of broods: One.
Flight time(s): July.
Winter: Egg.
Habits: Feed on honeydew in mature trees, but may visit nearby creeping thistle and brambles, where they spend a lot of time feeding on a single flower, before walking to another. It can be approached very closely. May be seen flitting around the canopy chasing one another.
Habitats: Woods and hedgerows where Elms are found.
Distribution:

Normalized Weekly Abundance


Flight time graph


No. of Adults

Number of adults
No. of 1km Squares

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)