White-letter hairstreak
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The white-letter hairstreak is a butterfly in the family Lycaenidae.
White Letter Hairstreak
Newly-laid egg
Mature caterpillar
White-letter hairstreak on Lutece elm
Black hairstreak
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The black hairstreak is a butterfly in the family Lycaenidae.
White-letter hairstreak
…from which this species gets its name. The outer edge of the hindwing has an orange border, but there is no orange on the forewings as on the similar black hairstreak and there are two short tails, the female's longer than the male's on the hindwings. Part of a group known as "lateral baskers", they always rest with…
Black hairstreak female laying egg
Satyrium pruni 1
Illustration from John Curtis's British Entomology Volume 5
Figs 5, 5a, 5b larva after last moult 5c pupa