Acmon Blue
The Acmon Blue (Plebejus acmon) is a small butterfly found in California west of the Sierra Nevada south into northern Baja California. It is sometimes spotted into Oregon. Upper sides of the male are bluish while the female more a brown coloration. The underside is white with black spots. Both sexes feature a red-orange band on the hindwing.
Wing spread: 0.75" - 1.1"
Host Plants: Buckwheats, lupines and milkvetches
Acmon Blue Butterfly Life Cycle Stages and Times
| Stage | Typical Duration |
| Egg stage | 3 to 6 days |
| Caterpillar (larval) stage | 2 to 3 weeks |
| Chrysalis (pupal) stage | 8 to 12 days |
| Adult butterfly stage | 4 to 10 days |
Acmon Blue Butterfly |
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Acmon Blue Butterfly in California |
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Photos by and courtesy of Alan Schmierer |