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green hairstreak

Jim Higham

Green Hairstreak butterfly

©Sue Crookes

Green hairstreak

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Enw gwyddonol: Callophrys rubi
The green hairstreak is the UK's only green butterfly. Look out for the vibrant, metallic sheen of the undersides of its wings on grassland and moorland, and along woodland rides.

Top facts

Stats

Wingspan: 2.7-3.4cm

Conservation status

Common.

Pryd i'w gweld

April to June

Ynghylch

The green hairstreak is a small, fairly shy butterfly that spends most of its time perched on vegetation or sunbathing. Adults fly in the spring, between April and June, and males can sometimes be seen chasing each other in the sun. Found in dry, scrubby habitats, including moorland and heathland, the caterpillars feed on a variety of plants, including gorse, broom and bilberry.

What to look for

The green hairstreak is a small butterfly. The undersides of its wings are bright green with a faint streak of white spots. The uppersides of its wings are dull brown. It rests with its wings closed.

Where to find

Widespread, although it is not common anywhere.

Habitats

Roeddech chi yn gwybod?

Adult green hairstreaks emerge in spring, and the females lay their eggs. After a week, the caterpillars hatch and feed. In July, they make their way to the ground to pupate and overwinter in the leaf litter. New butterflies emerge the following the spring.