Active only during the hottest part of hot, sunny, and relatively still days. The adult moths live for 1-4 days. Larvae spend 2 or more years underground. Adult moths emerge from underground between November-December. Females lay 100 to 150 eggs; they rarely fly and mostly walk. Males can make long flights but do not travel more than 100 m away from suitable habitat patches. This means it is difficult for them to colonise new areas at a distance.
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Description |
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Identifying Characteristics |
Medium sized, day-flying moth with a wing span up to 34 cm. Females have a slightly smaller wingspan of 31 cm and a long tapering body. The upperside of the forewings of females is grey patterned; their hindwings are bright orange with black spots along the edges. The male's upperside forewings are grey and and hindwings are bronze-brown. Both have clubbed antennae.
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Distinctive Markings |
Day flying moth. Clubbed antennae. The female's upper hindwing is bright orange with black spots along the edges; the male's is bronze-brown.
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Diet |
Herbivore. Larvae feed on the roots of native grasses.
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Habitat |
Native grasslands and grassy woodlands, especially those with wallaby grasses (Rytidosperma spp.), but also grasslands with native red-leg grass (Bothriochloa macra), spear-grasses (Austrostipa spp.), weeping grass (Microlaena stipoides var. stipoides) or kangaroo grass (Themeda triandra). They prefer grasslands with bare ground between tussocks, probably so males can more easily find females.
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Native Status |
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Taxonomy |
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This moth was widespread in south-eastern Australia at the time of European settlement. Now found only in a few small sites in New South Wales, the Australian Capital Territory and Victoria. Most of these sites are railway or roadside reserves or private land.
Distribution maps indicate current and historic locations where species have been sighted.
Source: Atlas of Living Australia