Baird's Swallowtail
Common NameBaird's Swallowtail
Scientific NamePapilio bairdii
FamilyPapilionidae
SubfamilyPapilioninae
Wingspan (mm)85
Wing Patternstriped
Primary Colorsblack, yellow, blue, orange
HabitatArid and semi-arid regions, sagebrush scrub, open woodlands, canyons, mountain slopes
Geographic RangeWestern North America, primarily Rocky Mountain states (e.g., Colorado, Utah, Wyoming, Montana, Idaho, Nevada, Arizona, New Mexico)
Host PlantsLomatium dissectum, other Lomatium species, Artemisia
Flight PeriodLate May to early August
Flight Stylegliding
Conservation Statusleast-concern
Lifecycle NotesEggs are laid singly on host plant leaves. Larvae are green with black and yellow markings, developing an osmeterium for defense. Pupae are chrysalides, often overwintering.
Identification TipsDistinguished from the similar Black Swallowtail by its larger size, broader yellow bands, and often more prominent blue and orange markings on the hindwings. Its range is primarily in the western US.
Description
A large, striking black swallowtail butterfly with broad yellow bands across its wings. The hindwings feature a row of iridescent blue spots and a prominent orange eyespot near the tails.
