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 409 - 432 of 978 verified sightings
Observation date: Aug 06, 2016
Submitted by: MAKI
Region: Stanislaus County, California, United States
Verified by: Ken Davenport
Verified date: Sep 04, 2016
Observation date: Aug 20, 2016
Submitted by: Breck Breckenridge
Region: San Joaquin County, California, United States
Verified by: Ken Davenport
Verified date: Aug 20, 2016
Observation date: Aug 20, 2016
Submitted by: Breck Breckenridge
Region: San Joaquin County, California, United States
Verified by: Ken Davenport
Verified date: Aug 20, 2016
Observation date: Aug 14, 2016
Submitted by: ezeemonee
Region: Monterey County, California, United States
Verified by: Ken Davenport
Verified date: Aug 16, 2016
Observation date: Aug 11, 2016
Submitted by: RichHubie
Region: Mendocino County, California, United States
Verified by: Ken Davenport
Verified date: Aug 14, 2016
Observation date: Jul 24, 2016
Submitted by: mathgeek
Region: Napa County, California, United States
Verified by: Ken Davenport
Verified date: Aug 12, 2016
Observation date: Aug 07, 2016
Submitted by: RichHubie
Region: Mendocino County, California, United States
Verified by: Ken Davenport
Verified date: Aug 07, 2016
Observation date: Aug 03, 2016
Submitted by: yardbird
Region: Calaveras County, California, United States
Verified by: Ken Davenport
Verified date: Aug 04, 2016
Observation date: Aug 01, 2016
Submitted by: ezeemonee
Region: Santa Barbara County, California, United States
Verified by: Ken Davenport
Verified date: Aug 03, 2016
Observation date: Aug 01, 2016
Submitted by: ezeemonee
Region: Santa Barbara County, California, United States
Verified by: Ken Davenport
Verified date: Aug 03, 2016
Observation date: Jun 27, 2016
Submitted by: ncrosbyrd
Region: Sierra County, California, United States
Verified by: Ken Davenport
Verified date: Jul 25, 2016
Observation date: Jun 18, 2016
Submitted by: Breck Breckenridge
Region: San Joaquin County, California, United States
Verified by: Ken Davenport
Verified date: Jul 23, 2016
Observation date: Jun 11, 2016
Submitted by: ncrosbyrd
Region: Kern County, California, United States
Verified by: Ken Davenport
Verified date: Jul 21, 2016
Observation date: Jun 08, 2016
Submitted by: ncrosbyrd
Region: Los Angeles County, California, United States
Verified by: Ken Davenport
Verified date: Jul 21, 2016
Observation date: Jul 14, 2016
Submitted by: ezeemonee
Region: Santa Barbara County, California, United States
Verified by: Ken Davenport
Verified date: Jul 17, 2016
Observation date: May 19, 2016
Submitted by: D. Dodd
Region: Jeff Davis County, Texas, United States
Verified by: stomlins701
Verified date: Jul 16, 2016
Observation date: Jun 19, 2016
Submitted by: diwalks2@gmail.com
Region: San Bernardino County, California, United States
Verified by: Ken Davenport
Verified date: Jul 12, 2016
Observation date: Jul 02, 2016
Submitted by: ezeemonee
Region: Ventura County, California, United States
Verified by: Ken Davenport
Verified date: Jul 04, 2016
Observation date: Jun 30, 2016
Submitted by: Mike Witkowski
Region: Sonoma County, California, United States
Verified by: Ken Davenport
Verified date: Jul 02, 2016
Observation date: Mar 26, 2016
Submitted by: rhedden
Region: Crosby County, Texas, United States
Verified by: stomlins701
Verified date: Jul 02, 2016
Observation date: Jun 08, 2016
Submitted by: John Wilson
Region: Socorro County, New Mexico, United States
Verified by: stevecary
Verified date: Jul 01, 2016
Observation date: Jun 29, 2016
Submitted by: MTmariposa
Region: Missoula County, Montana, United States
Verified by: J_Martineau
Verified date: Jun 30, 2016
Observation date: Jun 23, 2016
Submitted by: RichHubie
Region: Mendocino County, California, United States
Verified by: Ken Davenport
Verified date: Jun 28, 2016
Observation date: Jun 21, 2016
Submitted by: sarabseth
Region: Alameda County, California, United States
Verified by: Ken Davenport
Verified date: Jun 22, 2016
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