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Hyalophora columbia, the Columbia silkmoth or larch silkmoth, is a moth of the family Saturniidae. In the east it is found from Quebec and Ontario to Michigan, northern Wisconsin, and south-eastern Manitoba. In the west it is found from Alberta and Montana south through the Rocky Mountains to south-western Texas and into central Mexico. The species was first described by Sidney Irving Smith in 1865.

Hyalophora columbia
Conservation status
Apparently Secure  (NatureServe)
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Lepidoptera
Family:	Saturniidae
Genus:	Hyalophora
Species:	H. columbia
Binomial name
Hyalophora columbia (S. I. Smith, 1865)
Synonyms
Samia columbia Smith, 1865 Hyalophora gloveri (Strecker, 1872) Platysamia gloveri Strecker, 1872 Platysamia gloveri var. reducta Neumoegen, 1891 Platysamia columbia nokomis Brodie, 1894 Platysamia columbia winonah Brodie, 1894

The wingspan is 80–100 mm. Adults are on wing from May to July. There is one generation per year.

The larvae feed on Larix laricina in the eastern part of their range. Furthermore, it has been recorded on in Prunus pensylvanica, Alnus rugosa and Betula papyrifera in western Ontario. In the west they feed on Prunus demissa, Prunus emarginata, Purshia tridentata, Rosa, Salix, Shepherdia argentea, Eleagnus angustifolius and Ceanothus.

Subspecies

• Hyalophora columbia columbia
• Hyalophora columbia gloveri (Rocky Mountains) - also considered a separate species as Hyalophora gloveri

External links

• McLeod, Robin (July 31, 2014). "Species Hyalophora columbia - Columbia Silkmoth - Hodges#7768". BugGuide. Retrieved November 11, 2018.
• Lotts, Kelly & Naberhaus, Thomas (2017). "Columbia silkmoth Hyalophora columbia (S.I. Smith, 1865)". Butterflies and Moths of North America. Retrieved November 11, 2018.
• "The Columbia Moth Hyalophora columbia columbia (S. I. Smith, 1865)". Silkmoths. Retrieved November 11, 2018.

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