Entoma
Common pierrot, Castalius rosimon, plate

Blues and coppers

Castalius rosimon

Common pierrot

Common pierrot caterpillars grow up feeding only on jujube leaves, yet the adult darts and zigzags between flowers faster than almost any other small blue butterfly.

WhereWasteland, scrub and flower gardens
Size24 to 32 mm wingspan
WhenJanuary to December

The Common pierrot is a small black and white butterfly, the white ground colour broken by black spots and a black edged margin, with a short tail on each hindwing. Females carry broader black markings than males on both wing surfaces.

Caterpillars feed on jujube and other Ziziphus shrubs, and adults fly with an extremely fast, jerky, acrobatic flight between wastelands, open scrub and flowering gardens across South and Southeast Asia.

Traits

Habitat

Garden

Colour

Black, White, Blue

Active

Day

To people

Harmless to handle; a fast, erratic flier rarely still for long.

Activity through the year

Often confused with

Spotted pierrotnot in guide
Tarucus callinara

Pierrots in the genus Tarucus carry an overall blue violet flush across the wings, giving them their common name of blue pierrots, while the Common pierrot is white with black spots and only a small patch of metallic blue scaling at the wing base.

Questions

Is the Common pierrot dangerous to people?

Harmless to handle; a fast, erratic flier rarely still for long.

When can you see the Common pierrot?

The Common pierrot can be seen from January to December, by day.

Plate retouched from a museum specimen photo by Swiss Natural History Collections - SwissNatColl, CC BY 4.0, GBIF Licence

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Butterflies and moths›Blues and coppers›Castalius

Last updated 2026-09-27. Every entry is checked against published sources.