White-letter Hairstreak (Satyrium w-album)

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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.
UK BAP status: Priority Species
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: Feeds on honeydew in mature trees, but loves to visit nearby creeping thistle, where it will spend a lot of time feeding on a single flower, before walking to another. It can be approached closely and is very docile. Rarely flies.
Habitats: Woods and hedgerows where Elms are found.
Distribution

No. of Adults

Number of adults per year
No. of 1km Squares

Number of 1km squares per year
No. of Records

Number of records per year
No. of Adults per record

Adults per record per year
No. of adults per 10,000 records

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

Percentage of all butterfly records<br> per year
Flight Times


Flight time graph
Week no.s