Papilio machaon oregonia
Size: 2.75 - 3.25 inches wingspan
Key ID features: Upperside yellow with black bands, veins, and patches, long single tails, blue chevrons on black band near hindwing margin. On HW above, black "pupil" on red eyespot is at the edge of the red, not centered. Abdomen is yellow on sides with relatively narrow black bands on top and bottom. Below, similar pattern as above, with paler yellow ground color, with reddish-orange halos on some of the HW blue chevrons.
Similar species: Anise Swallowtail somewhat smaller, black pupil on HW red eyespots is centered within the red, abdomen is mostly black, with narrow yellow bands on sides.
Host plant: Wild tarragon (Artemisia dracunculus).
Habitat: Canyons, hillsides, where host plant is found, and on cliffs, ridges, plateaus and mountains above.
Range: Throughout Deschutes, Columbia and Snake River basins.
Season: Mid-March to mid-October
Conservation Status: Secure