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Red admiral butterfly

Insect

Illustration of red admiral butterfly
Red admiral butterfly

Vanessa atalanta

Red admirals have dark black-brown wings, each with an orange-red band. The forewing tips are black with white spots; the underside is orange, blue and white, while the hindwings are camouflaged dark brown.

After hibernation, adults have a strong urge to fly northwards, bringing immigrants from the Continent throughout the summer. By mid-August they start to return south, leading to a build up in southern England in autumn.

During the summer females lay single eggs on the growing tips of nettles. After a week or so, the caterpillars hatch and each spins a tent around itself by fastening a young leaf double with silk. Four weeks later caterpillars pupate in a similar ‘tent’. Adults may hibernate in England, usually choosing an exposed site such as a tree trunk, and many perish. 

Caterpillars are bristly and dark with a pale yellow stripe running down each side.

What does it eat?

Adults drink nectar from flowers: buddleia is a favourite. Feeds on rotting fruit in autumn. Caterpillars eat stinging nettles.

When will I see it?

Adults and caterpillars between May and October.

Where will I see it?

Feeding on a variety of flowers, basking in the sunshine. Found in most flowery places in urban and rural locations.

Vital statistics

Length: 60 mm across forewings

Calendar

Not seen in JanuaryNot seen in FebruaryNot seen in MarchNot seen in AprilSeen in MaySeen in JuneSeen in JulySeen in AugustSeen in SeptemberSeen in OctoberNot seen in NovemberNot seen in December

Key to calendar

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