Bug FAQAcmon Blue
Icaricia acmon · Order: Lepidoptera · Family: Lycaenidae
Acmon Blue butterflies have a wingspan of about 17-30 mm. They live in many habitats across California, Oregon, parts of Canada and the Great Plains, ranging over roughly 2.5 million km².
Source: Wikipedia
How to recognize it
Males have blue tops on their wings with dark borders; females have brown tops.
Source: Wikipedia
Size
The wingspan ranges from 17 to 30 mm.
Source: Wikipedia
Where it lives
It occurs in grasslands, fields, shrublands, forests and deserts.
Source: Wikipedia
What it eats
Adults feed on nectar. Caterpillars eat leaves, flowers, deerweed, buckwheats, lupines, trefoils, wild buckwheat fruits, legumes and milkvetches.
Source: Wikipedia
Where it comes from
Mainly found in California and Oregon, also in southwestern Canada and the U.S. Great Plains, covering about 2.5 million km².
Source: Wikipedia
Where it is found in the US
Recorded in 13 of 51 states and DC. Most records: California, Oregon, Washington, Idaho, New Mexico, Arizona, Colorado, Nevada.
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Status: native in North America; native in Canada; native in United States. Source: iNaturalist
Months it is reported in the US
Source: GBIF
More photos
Same family (Lycaenidae)
Sources
- Wikipedia: https://en.wikipedia.org/wiki/Acmon_blue
Look it up elsewhere: GBIF · iNaturalist · BugGuide · Wikipedia
Text written 2026-10-22 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-22.