Saddleback Caterpillar Moth vs Little Carpenterworm

Side-by-side species comparison

Attribute Saddleback Caterpillar Moth Little Carpenterworm
Scientific Name Acharia stimulea Prionoxystus macmurtrei
Order Lepidoptera Lepidoptera
Family Limacodidae Cossidae
Size 26-35 mm wingspan 25–45 mm wingspan
Habitat Orchards Woodlands
Diet Omnivores Wood Feeders
Regions Eastern North America Eastern North America
Conservation Least Concern Not Evaluated

Saddleback Caterpillar Moth

A dark brown moth best known for its extraordinary caterpillar, which is bright green with a brown saddle-shaped marking and venomous spines. The sting causes intense burning pain.

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Did You Know?

Its sting is among the most painful of any North American caterpillar and can cause nausea in sensitive individuals.

Little Carpenterworm

A smaller relative of the carpenterworm moth that bores into oaks and other hardwoods. Larvae create long tunnels through the sapwood and heartwood.

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Did You Know?

Its tunnels reduce the commercial value of lumber and provide entry points for wood-decay fungi.