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Subspecies Papilio machaon oregonius - Oregon Swallowtail

Western Tiger Swallowtail possibly? - Papilio machaon - male Western Tiger Swallowtail possibly? - Papilio machaon - male Swallowtail - Papilio machaon - male Swallowtail - Papilio machaon - male Papilio 8-20-11 01a - Papilio machaon - male Old World Swallowtail
Show images of: caterpillars · adults · both
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Lepidoptera (Butterflies and Moths)
Superfamily Papilionoidea (Butterflies and Skippers)
Family Papilionidae (Swallowtails, Parnassians)
Subfamily Papilioninae
Tribe Papilionini (Fluted Swallowtails)
Genus Papilio
Species machaon (Old World Swallowtail - Hodges#4166)
Subspecies oregonius (Oregon Swallowtail)
Synonyms and other taxonomic changes
Papilio hippocrates var. oregonia W. H. Edwards, 1876. Type locality: The Dalles, Oregon
Papilio oregonius
Papilio bairdii subspecies oregonius
Identification
Distinguised from yellow form P. bairdii by having more extensive yellow, and by more northwesterly distribution. In area of contact the change from one to the other is not well defined, and in that region it is difficult to decice which name to use.

To tell from P. zelicaon see comments under P. bairdii.
Range
Primarily east of Cascades in Upper Columbia River drainage (in British Columbia, Washington, Oregon, Idaho, and perhaps a bit into Nevada and California, blends with P. "machaon" bairdii to the east and especially to the south.
Habitat
Mostly desert and grasslands in dry broken terrain below the mountain forests.