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.
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Verified Sightings
Displaying 217 - 240 of 976 verified sightings
Observation date: Oct 07, 2020
Submitted by: Team Kweeper
Region: Sacramento County, California, United States
Verified by: Ken Davenport
Verified date: Oct 08, 2020
Observation date: Oct 03, 2020
Submitted by: SVOV
Region: Solano County, California, United States
Verified by: Ken Davenport
Verified date: Oct 04, 2020
Observation date: Sep 29, 2020
Submitted by: Axarus
Region: Merced County, California, United States
Verified by: Ken Davenport
Verified date: Sep 30, 2020
Observation date: Sep 29, 2020
Submitted by: Axarus
Region: Merced County, California, United States
Verified by: Ken Davenport
Verified date: Sep 30, 2020
Observation date: Sep 23, 2020
Submitted by: Kathy Early
Region: Santa Clara County, California, United States
Verified by: Ken Davenport
Verified date: Sep 23, 2020
Observation date: Jul 06, 2020
Submitted by: jhintermeister
Region: Santa Clara County, California, United States
Verified by: Ken Davenport
Verified date: Aug 13, 2020
Observation date: Aug 11, 2020
Submitted by: jhintermeister
Region: Santa Clara County, California, United States
Verified by: Ken Davenport
Verified date: Aug 12, 2020
Observation date: Mar 17, 2013
Submitted by: jhintermeister
Region: Santa Clara County, California, United States
Verified by: Ken Davenport
Verified date: Aug 09, 2020
Observation date: Jun 21, 2020
Submitted by: guy_incognito
Region: San Bernardino County, California, United States
Verified by: Ken Davenport
Verified date: Aug 05, 2020
Observation date: Jul 29, 2020
Submitted by: Lisahug
Region: Modoc County, California, United States
Verified by: Ken Davenport
Verified date: Aug 01, 2020
Observation date: Jul 22, 2020
Submitted by: cklindsey
Region: Modoc County, California, United States
Verified by: Ken Davenport
Verified date: Aug 01, 2020
Observation date: Jul 28, 2020
Submitted by: jhintermeister
Region: Santa Clara County, California, United States
Verified by: Ken Davenport
Verified date: Jul 30, 2020
Observation date: Jul 25, 2020
Submitted by: ezeemonee
Region: Kern County, California, United States
Verified by: Ken Davenport
Verified date: Jul 28, 2020
Observation date: Jul 23, 2020
Submitted by: Rozelle Wright
Region: Los Alamos County, New Mexico, United States
Verified by: stevecary
Verified date: Jul 27, 2020
Observation date: Jul 14, 2020
Submitted by: Thomlinson
Region: Los Angeles County, California, United States
Verified by: Ken Davenport
Verified date: Jul 16, 2020
Observation date: Jul 03, 2020
Submitted by: Axarus
Region: Mariposa County, California, United States
Verified by: Ken Davenport
Verified date: Jul 16, 2020
Observation date: Jul 05, 2020
Submitted by: MAKI
Region: Riverside County, California, United States
Verified by: Ken Davenport
Verified date: Jul 16, 2020
Observation date: Jul 09, 2020
Submitted by: Axarus
Region: Merced County, California, United States
Verified by: Ken Davenport
Verified date: Jul 16, 2020
Observation date: Jul 15, 2020
Submitted by: zencoyote
Region: San Diego County, California, United States
Verified by: Ken Davenport
Verified date: Jul 15, 2020
Observation date: Jul 15, 2020
Submitted by: zencoyote
Region: San Diego County, California, United States
Verified by: Ken Davenport
Verified date: Jul 15, 2020
Observation date: Jul 13, 2020
Submitted by: Jebflutterby
Region: Santa Cruz County, California, United States
Verified by: Ken Davenport
Verified date: Jul 15, 2020
Observation date: Jul 06, 2020
Submitted by: Jebflutterby
Region: Santa Cruz County, California, United States
Verified by: Ken Davenport
Verified date: Jul 15, 2020
Observation date: Jun 23, 2020
Submitted by: ezeemonee
Region: Ventura County, California, United States
Verified by: Ken Davenport
Verified date: Jun 25, 2020
Observation date: Jun 21, 2020
Submitted by: mstanek
Region: Los Angeles County, California, United States
Verified by: Ken Davenport
Verified date: Jun 22, 2020
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