Bogong moth

Definition

A temperate noctuid moth (Agrotis infusa) renowned for biannual long-distance migrations between breeding grounds in southern Queensland, New South Wales, Victoria, Tasmania, and South Australia, and aestivation sites in the Australian Alps. Adults migrate to alpine caves and crevices in spring to escape summer heat, returning to lowland breeding areas in autumn; larvae feed on winter pasture plants. The species serves as a critical seasonal food source for alpine fauna and holds cultural significance for Indigenous Australians.

Etymology

From Mount Bogong, the highest peak in Victoria, Australia, where the moths congregate in vast numbers to aestivate; the mountain's name derives from the Dhudhuroa word 'bugung' meaning 'brown moth'.

Example

During summer aestivation, millions of Bogong moths densely pack into granite caves above 1,500 m elevation, reducing metabolic activity until autumn rains trigger migration to breeding grounds.

Synonyms

• Agrotis infusa

Related Terms

• Aestivation
• Migration
• Noctuidae
• Cutworm
• alpine ecology
• seasonal polyphenism
• Indigenous food sources

Usage Notes

The common name refers specifically to the migratory population; non-migratory individuals in the same range are not distinguished by this term. The species is occasionally spelled 'Bogong' or 'Bogong' in older literature; 'Bogong' is now standard. Larvae are typical Agrotis cutworms and lack a distinct common name.