Home / Cossid Millers Moth (Cossidae) / Giant Wood Moth (Endoxyla cinereus)

Giant Wood Moth (Endoxyla cinereus)

Giant wood moth of the carpenter millers or cossid millers family is a native of Australia and New Zealand. They have a reputation of boring into the wood of eucalyptus trees, hence the name.

Giant Wood Moth

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Scientific Classification


  • Family: Cossidae
  • Genus: Endoxyla
  • Scientific Name: Endoxyla cinereus

Description and Identification

Caterpillar

In Australia, most larvae of the wood-eating moths are known as witchety grub because of their worm-like appearance, and this one is no exception. It has a pale brown or whitish segmented body.

When newly emerged, they remain wrapped in silken threads, feeding on their host plants’ roots.

Giant Wood Moth Learvae

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Pupa

The larva mostly bores into species of Eucalyptus trees, making a hole in them, where the pupation phase occurs.

Giant Wood Moth Pupa

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Adult Moth

Sexual Dimorphism: Males appear smaller than females, being half their size.

Color and Appearance

Forewings: When opened, it is gray with light brown spots. When closed, the brown spots do not appear too prominent.

Hindwings: When opened and closed, the hindwings are brown.

Average Wingspan: 23 cm

Flight Pattern: Not recorded

Season: Not recorded

Endoxyla cinereus

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Egg

The eggs are small, and in a lifetime, the female giant wood moth lays about 20,000 of them.

Quick Facts

DistributionAustralia (New South Wales and Queensland), New Zealand
HabitatIn eucalyptus forests
PredatorsBats and birds
Lifespan of AdultsOne year
Host PlantsEucalyptus
Adult DietNot recorded

Did You Know

The giant wood moth species are one of the world’s largest moths, with females weighing about 30 grams.

Giant Wood Moth Image

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Giant Wood Moth Photo

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Giant Wood Moth Picture

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