Thoas Swallowtail
Papilio thoas Linnaeus, 1771
Family: Papilionidae
Subfamily: Papilioninae
Identification: Upperside of forewing has diagonal yellow band of square spots in a neat row.
Wing Span: 4 1/8 - 5 inches (10.5 - 12.8 cm).
Life History: Caterpillars resemble bird droppings and rest exposed on leaves.
Flight: Year-round in the tropics, April-July in south Texas.
Caterpillar Hosts: Plants in the citrus family (Rutaceae) including Citrus spp., prickly ash (Zanthoxylum americanum), hop tree (Ptelea trifoliata); six species in the Piperaceae family.
Adult Food: Flower nectar, including lantana, cesalpina, and bougainvilla.
Habitat: Mid-elevation tropical forests and lowland edges.
Range: South Texas south to Brazil. Very rare stray into Kansas and Oklahoma.
Conservation: Not needed in the United States.
NCGR: G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.
Management Needs: None in the United States.
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Verified Sightings
Displaying 49 - 60 of 60 verified sightings
Observation date: unknown
Submitted by: legacy.reporter
Region: Hidalgo County, Texas, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Texas, Travis County, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Logan County, Colorado, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Sonora, Mexico
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Texas, Val Verde County, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Sinaloa, Mexico
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Texas, Zapata County, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Cameron County, Texas, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Tamaulipas, Mexico
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Dallas County, Texas, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Sedgwick County, Colorado, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Pittsburg County, Oklahoma, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
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