Attributes of Plebejus acmon

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.
Taxonomy Notes:

Images of Plebejus acmon

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Plebejus acmon - Plebejus_acmonSanders.jpg

Plebejus acmon - Plebejus_acmonSanders.jpg
Plebejus acmon - 3820_56.jpg

Plebejus acmon - 3820_56.jpg

The map below displays all BAMONA data for this species and has three different data layers:
1. All records (yellow dots)   2. Recently verified records (orange dots)*   3. US county records (purple)

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*The orange dots on the map provide access to information about the 400 most recently verified sightings of this species. Sometimes, there are several records at the same location. Use the table view to access these records.

By default, the fifty most recently verified sightings are below. Sort by Observation Date to see the most recent sightings, or filter the sightings by region to get a regional list.

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Observation Date Submitter Region Verified Datesort icon
August 20, 2016 breck7348 San Joaquin County, California, United States August 20, 2016 Details
August 20, 2016 breck7348 San Joaquin County, California, United States August 20, 2016 Details
August 14, 2016 ezeemonee Monterey County, California, United States August 16, 2016 Details
August 11, 2016 RichHubie Mendocino County, California, United States August 14, 2016 Details
July 24, 2016 mathgeek Napa County, California, United States August 12, 2016 Details
August 07, 2016 RichHubie Mendocino County, California, United States August 07, 2016 Details
August 03, 2016 yardbird Calaveras County, California, United States August 04, 2016 Details
August 01, 2016 ezeemonee Santa Barbara County, California, United States August 03, 2016 Details
August 01, 2016 ezeemonee Santa Barbara County, California, United States August 03, 2016 Details
June 27, 2016 ncrosbyrd Sierra County, California, United States July 25, 2016 Details
June 18, 2016 breck7348 San Joaquin County, California, United States July 23, 2016 Details
June 08, 2016 ncrosbyrd Los Angeles County, California, United States July 21, 2016 Details
June 11, 2016 ncrosbyrd Kern County, California, United States July 21, 2016 Details
July 14, 2016 ezeemonee Santa Barbara County, California, United States July 17, 2016 Details
May 19, 2016 D. Dodd Jeff Davis County, Texas, United States July 16, 2016 Details
June 19, 2016 diwalks2 San Bernardino County, California, United States July 12, 2016 Details
July 02, 2016 ezeemonee Ventura County, California, United States July 04, 2016 Details
March 26, 2016 rhedden Crosby County, Texas, United States July 02, 2016 Details
June 30, 2016 Mike Witkowski Sonoma County, California, United States July 02, 2016 Details
June 08, 2016 John Wilson Socorro County, New Mexico, United States July 01, 2016 Details
June 29, 2016 M Kuhlman Missoula County, Montana, United States June 30, 2016 Details
June 23, 2016 RichHubie Mendocino County, California, United States June 28, 2016 Details
June 19, 2016 diwalks2 San Bernardino County, California, United States June 22, 2016 Details
June 21, 2016 sarabseth Alameda County, California, United States June 22, 2016 Details
June 12, 2016 efulrich Monterey County, California, United States June 13, 2016 Details
June 12, 2016 efulrich Monterey County, California, United States June 13, 2016 Details
April 22, 2016 mmjdelgado Santa Barbara County, California, United States June 04, 2016 Details
May 19, 2016 TPeterson San Mateo County, California, United States May 30, 2016 Details
May 19, 2016 TPeterson San Mateo County, California, United States May 30, 2016 Details
May 19, 2016 TPeterson San Mateo County, California, United States May 30, 2016 Details
April 23, 2016 ezeemonee San Nicolas Island County, California, United States April 26, 2016 Details
April 22, 2016 ezeemonee San Nicolas Island County, California, United States April 25, 2016 Details
March 13, 2016 MAKI Los Angeles County, California, United States March 16, 2016 Details
February 27, 2016 Nancy Hamlett Los Angeles County, California, United States March 16, 2016 Details
March 05, 2015 Josiah Gilbert San Luis Obispo County, California, United States December 29, 2015 Details
June 06, 2013 Josiah Gilbert San Luis Obispo County, California, United States December 29, 2015 Details
October 13, 2015 Josiah Gilbert San Luis Obispo County, California, United States December 29, 2015 Details
June 25, 2015 J_Martineau Teton County, Wyoming, United States December 11, 2015 Details
November 07, 2015 MAKI Ventura County, California, United States November 10, 2015 Details
October 16, 2015 Sue Orlowski Lincoln County, Washington, United States October 21, 2015 Details
October 07, 2015 Leah N. Moffatt San Mateo County, California, United States October 12, 2015 Details
October 07, 2015 Leah N. Moffatt San Mateo County, California, United States October 12, 2015 Details
October 01, 2015 Sue Orlowski Adams County, Washington, United States October 08, 2015 Details
August 11, 2011 plex1ppus Spokane County, Washington, United States September 24, 2015 Details
August 11, 2015 Jdammarell Lincoln County, Washington, United States September 24, 2015 Details
September 01, 2015 Nancy Asquith Santa Clara County, California, United States September 02, 2015 Details
August 17, 2015 ezeemonee Santa Barbara County, California, United States August 18, 2015 Details
August 11, 2015 ezeemonee Santa Barbara County, California, United States August 15, 2015 Details
August 14, 2015 Nancy Hamlett Los Angeles County, California, United States August 15, 2015 Details
August 08, 2015 PONYRCR Los Angeles County, California, United States August 09, 2015 Details