Bug FAQJuanita Sphinx
Proserpinus juanita · Order: Lepidoptera · Family: Sphingidae
Also called: Juanita Sphinx Moth
The Juanita sphinx is a moth in the family Sphingidae that was first described in 1877. Its wingspan measures roughly 45 to 64 mm. The larvae feed on plants of the Onagraceae family, including Oenothera, Gaura and Epilobium species.
Source: Wikipedia
How to recognize it
Proserpinus juanita, known as the Juanita sphinx, belongs to the moth family Sphingidae.
Source: Wikipedia
Size
The adult’s wingspan ranges from about 45 mm to 64 mm.
Source: Wikipedia
Where it lives
It occurs from Montana and North Dakota southward to Arizona and eastward to Missouri and Texas.
Source: Wikipedia
What it eats
Caterpillars eat members of the Onagraceae family such as Oenothera, Gaura and Epilobium.
Source: Wikipedia
Where it comes from
Its native range includes U.S. states from Montana and North Dakota down to Arizona and across to Missouri and Texas.
Source: Wikipedia
Where it is found in the US
Recorded in 14 of 51 states and DC. Most records: Colorado, Texas, Nebraska, Oklahoma, Montana, New Mexico, South Dakota, Kansas.
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Status: native in North America; native in Canada. Source: iNaturalist
Months it is reported in the US
Source: GBIF
More photos
Same family (Sphingidae)
Sources
- Wikipedia: https://en.wikipedia.org/wiki/Proserpinus_juanita
Look it up elsewhere: GBIF · iNaturalist · BugGuide · ITIS · Wikipedia
Text written 2026-10-27 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-27.