Entoma
Peacock, Aglais io, plate

Brush-footed butterflies

Aglais io

Peacock

Threatened, it flicks its wings open to flash four eyespots and hisses by rubbing its wings together.

WhereGardens, woodland clearings, meadows with nettles
Size63 to 75 mm wingspan
WhenMarch to September

Adults spend the winter asleep in sheds, hollow trees and roof spaces, and are among the first butterflies out in spring.

The caterpillars are black and spiny and live together in large silk webs on stinging nettle.

Traits

Habitat

Garden

Colour

Red, Black

Active

Day

To people

Harmless

Activity through the year

Often confused with

Red admiralOpen entry ›
Vanessa atalanta

The red admiral has red bands across near-black wings, not eyespots.

Small tortoiseshellOpen entry ›
Aglais urticae

Orange with a row of blue marks along the edge and no large eyespots.

Questions

Is the Peacock dangerous to people?

The Peacock is harmless to people.

When can you see the Peacock?

The Peacock can be seen from March to September, by day.

Plate retouched from a museum specimen photo by Lauri Mällo, PlutoF, CC BY 4.0, GBIF Licence

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Butterflies and moths›Brush-footed butterflies›Aglais

Last updated 2026-09-26. Every entry is checked against published sources.