National Moth Week is July 18-26!
Moths are amazing creatures. Take photographs and share your moth sightings with us to document the moths where you live.
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 361 - 384 of 976 verified sightings
Observation date: Mar 31, 2018
Submitted by: ezeemonee
Region: Monterey County, California, United States
Verified by: Ken Davenport
Verified date: Apr 02, 2018
Observation date: Mar 19, 2018
Submitted by: ncrosbyrd
Region: San Diego County, California, United States
Verified by: Ken Davenport
Verified date: Mar 29, 2018
Observation date: Jun 14, 2015
Submitted by: JoseBonner
Region: Guadalupe County, New Mexico, United States
Verified by: stevecary
Verified date: Mar 15, 2018
Observation date: Aug 15, 2015
Submitted by: wallap74
Region: Grant County, New Mexico, United States
Verified by: stevecary
Verified date: Jan 29, 2018
Observation date: Aug 16, 2017
Submitted by: Matthew Lloyd
Region: Saskatchewan, Canada
Verified by: A_baldini
Verified date: Jan 28, 2018
Observation date: Oct 27, 2017
Submitted by: Lisahug
Region: Mendocino County, California, United States
Verified by: Ken Davenport
Verified date: Oct 27, 2017
Observation date: Oct 22, 2017
Submitted by: Lisahug
Region: Sonoma County, California, United States
Verified by: Ken Davenport
Verified date: Oct 23, 2017
Observation date: Sep 20, 2016
Submitted by: Protobikes
Region: Fresno County, California, United States
Verified by: Ken Davenport
Verified date: Oct 20, 2017
Observation date: Jul 09, 2016
Submitted by: A.Y.Liang
Region: Contra Costa County, California, United States
Verified by: Ken Davenport
Verified date: Oct 14, 2017
Observation date: Oct 09, 2017
Submitted by: Hahalua
Region: Santa Cruz County, California, United States
Verified by: Ken Davenport
Verified date: Oct 09, 2017
Observation date: Oct 01, 2017
Submitted by: Lisahug
Region: Sonoma County, California, United States
Verified by: Ken Davenport
Verified date: Oct 03, 2017
Observation date: May 19, 2007
Submitted by: Lisahug
Region: Sonoma County, California, United States
Verified by: Ken Davenport
Verified date: Sep 29, 2017
Observation date: Apr 12, 2009
Submitted by: Lisahug
Region: Sonoma County, California, United States
Verified by: Ken Davenport
Verified date: Sep 29, 2017
Observation date: Jul 24, 2005
Submitted by: Lisahug
Region: Sonoma County, California, United States
Verified by: Ken Davenport
Verified date: Sep 29, 2017
Observation date: Sep 21, 2017
Submitted by: Breck Breckenridge
Region: Solano County, California, United States
Verified by: Ken Davenport
Verified date: Sep 22, 2017
Observation date: Aug 23, 2017
Submitted by: Lisahug
Region: Sonoma County, California, United States
Verified by: Ken Davenport
Verified date: Sep 20, 2017
Observation date: Jul 09, 2014
Submitted by: Lisahug
Region: Marin County, California, United States
Verified by: Ken Davenport
Verified date: Sep 20, 2017
Observation date: May 19, 2016
Submitted by: Lisahug
Region: Sonoma County, California, United States
Verified by: Ken Davenport
Verified date: Sep 20, 2017
Observation date: Jul 25, 2016
Submitted by: Lisahug
Region: Sonoma County, California, United States
Verified by: Ken Davenport
Verified date: Sep 20, 2017
Observation date: Sep 01, 2017
Submitted by: abwest
Region: Mariposa County, California, United States
Verified by: Ken Davenport
Verified date: Sep 12, 2017
Observation date: Aug 11, 2017
Submitted by: HoppRobinson
Region: Chelan County, Washington, United States
Verified by: davidwdroppers
Verified date: Sep 06, 2017
Observation date: Aug 21, 2017
Submitted by: Chris Carvalho
Region: Deschutes County, Oregon, United States
Verified by: Ken Davenport
Verified date: Aug 29, 2017
Observation date: Jul 22, 2017
Submitted by: plex1ppus
Region: Grant County, Washington, United States
Verified by: davidwdroppers
Verified date: Aug 03, 2017
Observation date: Jun 14, 2017
Submitted by: Martin Reid
Region: Texas, Lipscomb County, United States
Verified by: stomlins701
Verified date: Jul 10, 2017
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