Old World Swallowtail
Papilio machaon Linnaeus, 1758
Family: Papilionidae
Subfamily: Papilioninae
Identification: Upperside of hindwing near tail has reddish-orange eyespot with black along lower border touching inner edge of hindwing or at least not a centered eyespot.
Wing Span: 2 1/2 - 3 inches (6.5 - 7.5 cm).
Life History: Females lay eggs singly on the host plant, and newly-hatched caterpillars eat the leaves. Older caterpillars feeding on plants of the parsley family prefer to eat the flowers. Chrysalids overwinter.
Flight: In north, one flight in late May-July; two flights in south.
Caterpillar Hosts: Sagebrushes (Artemisia species), including Arctic wormwood and wild tarragon, rarely plants in the parsley family.
Adult Food: Flower nectar.
Habitat: Open hilltops, mountain meadows, tundra.
Range: Holarctic. In North America, south from Alaska to northern British Colombia, east across Canada to western Quebec. Southern British Colombia south through New Mexico. Comments: Includes , P. oregonius and P. bairdii.
Conservation: Not noted as of concern, but is rare or uncommon.
NCGR: G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.
Management Needs: None noted.
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Verified Sightings
Displaying 241 - 264 of 404 verified sightings
Observation date: unknown
Submitted by: legacy.reporter
Region: Gallatin County, Montana, United States
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Verified date: Dec 31, 2004
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Region: Furnas County, Nebraska, United States
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Verified date: Dec 31, 2004
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Region: Shannon County, South Dakota, United States
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Verified date: Dec 31, 2004
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Region: Kittitas County, Washington, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
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Submitted by: legacy.reporter
Region: Garfield County, Colorado, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Madison County, Montana, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Lancaster County, Nebraska, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
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Submitted by: legacy.reporter
Region: Garfield County, Utah, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
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Submitted by: legacy.reporter
Region: Spokane County, Washington, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Lincoln County, Colorado, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Prairie County, Montana, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Santa Fe County, New Mexico, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Piute County, Utah, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
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Submitted by: legacy.reporter
Region: Greenlee County, Arizona, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Montezuma County, Colorado, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
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Submitted by: legacy.reporter
Region: Bowman County, North Dakota, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
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Submitted by: legacy.reporter
Region: Lincoln County, Nevada, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Uintah County, Utah, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Grand County, Colorado, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: McHenry County, North Dakota, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: White Pine County, Nevada, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Washington County, Utah, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Inyo County, California, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Nez Perce County, Idaho, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
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