Orchard Swallowtail

The male and female butterflies differ in colouring and pattern. They also fly in wide arcs and have a tendency to swoop.

When disturbed or touched, more mature caterpillars produce a red Y-shaped organ (osmeterium) from behind their head and emit a strong, rotting citrus odour as a warning to predators.

Scientific Name

Papilio aegeus

Feeds On

Citrus trees (Rutaceae)

Usual Location

Eastern Australia

Best Viewing

Throughout the year in the north, September to May in the south

Wing Span

12cm

Caterpillar

The body is humped and tapering to the rear. Early stages can be mistaken for bird droppings. This assists them in not being eaten. Mature caterpillars are olive green with brown and white diagonal bands.

Chrysalis

The pupa may be brown or green depending on the support structure on which they pupate. Fastened by a cremaster and a girdle, the head is pointed upward.