The Narrow-winged Pearl White (Elodina padusa) is a butterfly

Butterfly

A butterfly is a mainly day-flying insect of the order Lepidoptera, which includes the butterflies and moths. Like other holometabolous insects, the butterfly's life cycle consists of four parts: egg, larva, pupa and adult. Most species are diurnal. Butterflies have large, often brightly coloured...

 in the Pieridae

Pieridae

The Pieridae are a large family of butterflies with about 76 genera containing approximately 1,100 species, mostly from tropical Africa and Asia. Most pierid butterflies are white, yellow or orange in coloration, often with black spots...

 family. It is found across the central latitudes of Australia

Australia

Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

, including Victoria

Victoria (Australia)

Victoria is the second most populous state in Australia. Geographically the smallest mainland state, Victoria is bordered by New South Wales, South Australia, and Tasmania on Boundary Islet to the north, west and south respectively....

 and South Australia

South Australia

South Australia is a state of Australia in the southern central part of the country. It covers some of the most arid parts of the continent; with a total land area of , it is the fourth largest of Australia's six states and two territories.South Australia shares borders with all of the mainland...

.

The wingspan

Wingspan

The wingspan of an airplane or a bird, is the distance from one wingtip to the other wingtip. For example, the Boeing 777 has a wingspan of about ; and a Wandering Albatross caught in 1965 had a wingspan of , the official record for a living bird.The term wingspan, more technically extent, is...

 is about 40 mm. The upperside of the wings is white with black wingtips, while the undersides are white with grey wingtips.

The larvae feed on various Capparaceae

Capparaceae

Capparaceae , commonly known as the Caper family, is a family of plants in order Brassicales. As currently circumscribed, it contains 33 genera and about 700 species...

 species, including Capparis canescens and
Capparis mitchellii

Capparis mitchellii

The "Wild Orange" is an Australian native plant. Its scientific name is Capparis mitchellii; it is not related to oranges and neither to the Osage-orange which is known as "wild orange" in North America, but to capers. Its name in the Arrernte language of Central Australia is merne atwakeye.Wild...

. They are green with brown marks and a yellowish dorsal line. Full-grown larvae reach a length of about 20 mm. Pupation takes place in a green pupa with white marks, which is attached to a leaf of the host plant.