Acmon Blue
Plebejus acmon (Westwood, [1851])
Family: Lycaenidae
Subfamily: Polyommatinae
Identification: Upperside of males blue with dark narrow border; female brown. Underside white with black spot pattern. Hindwing above and below with red-orange submarginal band.
Wing Span: 3/4 - 1 1/8 inches (2 - 2.9 cm).
Life History: Males patrol near hosts for females. Eggs are laid singly on leaves or flowers of host plants. Caterpillars feed on leaves, flowers, and developing seeds, and are tended by ants. Second-stage caterpillars hibernate.
Flight: Many flights from March-October.
Caterpillar Hosts: Various species of buckwheats (Eriogonum nudum), lupines (Lupinus), trefoils (lotus), and milkvetches (Astragalus).
Adult Food: Flower nectar.
Habitat: Desert, fields, prairie hills, weedy areas, road edges.
Range: Primarily California west of Sierra Nevada-Cascade Divide south to northern Baja California. Precise limits in neighboring Oregon and Nevada not ascertained.
Conservation: Not usually of conservation concern.
NCGR: G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.
Management Needs: None reported.
Get your BAMONA Gear!
Please donate!
We depend on donations to keep Butterflies and Moths of North America freely available. We want to express our gratitude to all who showed their support by making a contribution this year. You can donate to support this project at any time.
Advertise with us!
Do you have a product or service that you think would interest BAMONA users? If you would like to advertise on this website, contact us by email, or use the contact form and select the "Advertising" category.
Verified Sightings
Displaying 25 - 48 of 931 verified sightings
Observation date: Jun 26, 2024
Submitted by: ezeemonee
Region: San Diego County, California, United States
Verified by: Ken Davenport
Verified date: Jul 03, 2024
Observation date: May 22, 2020
Submitted by: shar4j
Region: San Bernardino County, California, United States
Verified by: Ken Davenport
Verified date: Jun 25, 2024
Observation date: Jun 09, 2024
Submitted by: ASchmierer
Region: Ventura County, California, United States
Verified by: Ken Davenport
Verified date: Jun 16, 2024
Observation date: Jun 13, 2024
Submitted by: ASchmierer
Region: Tulare County, California, United States
Verified by: Ken Davenport
Verified date: Jun 15, 2024
Observation date: Jun 08, 2024
Submitted by: ezeemonee
Region: Monterey County, California, United States
Verified by: Ken Davenport
Verified date: Jun 09, 2024
Observation date: Apr 18, 2024
Submitted by: dvollmar
Region: San Bernardino County, California, United States
Verified by: Ken Davenport
Verified date: Apr 23, 2024
Observation date: Mar 25, 2024
Submitted by: MAKI
Region: Ventura County, California, United States
Verified by: Ken Davenport
Verified date: Apr 04, 2024
Observation date: Mar 14, 2024
Submitted by: madamirie
Region: Monterey County, California, United States
Verified by: Ken Davenport
Verified date: Mar 15, 2024
Observation date: Jan 01, 2024
Submitted by: Robert Gorman
Region: San Diego County, California, United States
Verified by: Ken Davenport
Verified date: Jan 08, 2024
Observation date: Oct 13, 2023
Submitted by: katrinaoller
Region: San Mateo County, California, United States
Verified by: mcduck
Verified date: Dec 02, 2023
Observation date: Oct 12, 2023
Submitted by: Sue Bocchicchio
Region: San Diego County, California, United States
Verified by: Ken Davenport
Verified date: Nov 03, 2023
Observation date: Oct 17, 2023
Submitted by: Martin Neil UK
Region: San Diego County, California, United States
Verified by: Ken Davenport
Verified date: Oct 24, 2023
Observation date: Oct 21, 2023
Submitted by: Seth Mueller
Region: San Bernardino County, California, United States
Verified by: Ken Davenport
Verified date: Oct 23, 2023
Observation date: Oct 07, 2023
Submitted by: madamirie
Region: Monterey County, California, United States
Verified by: Ken Davenport
Verified date: Oct 16, 2023
Observation date: Oct 05, 2023
Submitted by: hasfitz5
Region: Kern County, California, United States
Verified by: Ken Davenport
Verified date: Oct 09, 2023
Observation date: Sep 10, 2023
Submitted by: Lisahug
Region: Sonoma County, California, United States
Verified by: Ken Davenport
Verified date: Oct 05, 2023
Observation date: Sep 03, 2023
Submitted by: mrinmoy
Region: Santa Clara County, California, United States
Verified by: Ken Davenport
Verified date: Sep 06, 2023
Observation date: Aug 21, 2023
Submitted by: Patricia12
Region: Ventura County, California, United States
Verified by: Ken Davenport
Verified date: Sep 06, 2023
Observation date: Aug 26, 2023
Submitted by: CarolynS
Region: Butte County, California, United States
Verified by: Ken Davenport
Verified date: Aug 26, 2023
Observation date: Aug 18, 2023
Submitted by: Zencoyote
Region: San Diego County, California, United States
Verified by: Ken Davenport
Verified date: Aug 19, 2023
Observation date: Aug 05, 2023
Submitted by: MAKI
Region: Santa Barbara County, California, United States
Verified by: Ken Davenport
Verified date: Aug 17, 2023
Observation date: Jul 29, 2023
Submitted by: NikkiM
Region: Carbon County, Montana, United States
Verified by: J_Martineau
Verified date: Aug 07, 2023
Observation date: Jul 29, 2023
Submitted by: NikkiM
Region: Carbon County, Montana, United States
Verified by: J_Martineau
Verified date: Aug 07, 2023
Observation date: Jul 31, 2023
Submitted by: Zencoyote
Region: San Diego County, California, United States
Verified by: Ken Davenport
Verified date: Aug 04, 2023
- ‹ previous
- 2 of 39
- next ›