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Purple Hairstreak

(Favonius quercus)

The Purple Hairstreak is an elusive butterfly with a brilliant purple sheen. It is entirely reliant on Oak Trees and can be spotted chasing around the treetops in woodlands and parks.

Purple Hairstreak © Philip Precey
Purple Hairstreak Butterfly

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Overview

The Purple Hairstreak is rarely seen as it spends most of its time perched on leaves at the top of Oak trees. Very occasionally, it does come down to ground level, but it is best spotted with binoculars: males can sometimes be seen chasing each other in the treetops.

Key Facts

  • The Purple Hairstreak is an unmistakeable butterfly. Females are black above, with a purple patch on the forewings, while males are almost entirely purple above with a black border. The underside of both sexes is a silvery-grey, with an orange eyespot on the hindwing.
  • The Purple Hairstreak is the only butterfly in the UK which is entirely reliant on the Oak tree, and can be found in Oak woodland and on solitary Oak trees in parks or along hedgerows. It can use our two native species – Sessile Oak and Pedunculate Oak – as well as the introduced Turkey and Evergreen Oaks.
  • Wingspan: 3.1-4.0cm

Status

Common.

Seasonality

June to September

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