Appearance: Two tails on hindwing. Tiger stripes narrower than on Western Tiger Swallowtail. Often seen in high floating flight where two tails may not be distinguishable. Patrols stream courses looking for females. Males puddle where two tails are more likely to be seen.
Size: Large; 4 to 5 inches
Habitat: Foothills slopes and canyons, urban parks and gardens, valleys, streamsides, and woodlands
Season: May to mid-August
Larval Foodplant: Cottonwood, ash and chokecherry
Did You Know…
This butterfly is our second largest, exceeded only by the rare (for this area) Giant Swallowtail. Should be seen where green ash shade trees line urban streets.
Species Gallery (click to enlarge)