Bug FAQGreenish Blue
Plebejus saepiolus · Order: Lepidoptera · Family: Lycaenidae
The greenish blue butterfly, Plebejus saepiolus, belongs to the Lycaenidae family. It has a wingspan of about 21 to 28 mm and flies from June through August.
Source: Wikipedia
How to recognize it
Plebejus saepiolus, formerly Icaricia saepiolus, is a greenish-blue butterfly in the Lycaenidae family.
Source: Wikipedia
Size
The adult’s wingspan ranges from 21 to 28 mm.
Source: Wikipedia
Where it lives
It lives from the northwestern United States up into southern Saskatchewan and Alberta.
Source: Wikipedia
What it eats
Caterpillars feed on several clover species: Trifolium monathum, T. longipes and T. wormskioldii.
Source: Wikipedia
Life cycle
Adults are on the wing from June to August.
Source: Wikipedia
When you see it
The flight period spans the summer months, June through August.
Source: Wikipedia
Where it comes from
Its native range includes the northwestern United States and parts of Canada such as southern Saskatchewan and Alberta.
Source: Wikipedia
Where it is found in the US
Recorded in 19 of 51 states and DC. Most records: Colorado, California, Utah, Idaho, Michigan, Alaska, Arizona, Montana.
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Status: native in North America; native in United States; native in Canada. Source: iNaturalist
Months it is reported in the US
Source: GBIF
More photos
Same family (Lycaenidae)
Sources
- Wikipedia: https://en.wikipedia.org/wiki/Icaricia_saepiolus
Look it up elsewhere: GBIF · iNaturalist · BugGuide · Wikipedia
Text written 2026-10-23 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-23.