Arrowhead Blue
Glaucopsyche piasus (Boisduval, 1852)
Family: Lycaenidae
Subfamily: Polyommatinae
Identification: Checkered fringes. Upperside of male violet blue with a wide border; female duller. Underside gray with many small black spots. Hindwing with postmedian band of white "arrowheads" pointing inward.
Wing Span: 1 1/8 - 1 3/8 inches (2.9 - 3.5 cm).
Life History: Males patrol during the day near host plants. Females lay eggs on flower buds of host plant; caterpillars eat flowers and fruits. Chrysalids hibernate.
Flight: One brood from March-July.
Caterpillar Hosts: Lupine (Lupinus) and milkvetch (Astragalus) species in the pea family (Fabaceae).
Adult Food: Flower nectar.
Habitat: Coastal dunes and lowlands in California; mountains elsewhere: scrub, openings in woods, roadsides, trails, meadows, clearings, streamsides.
Range: Local and uncommon. British Columbia and southern Alberta south through the mountains of western North America to southern California, northern Arizona, and western Nebraska.
Conservation: Populations in southern California need assessment; elsewhere populations are probably not in jeopardy.
NCGR: G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.
Management Needs: Not reported.
Comments: NULL
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Verified Sightings
Displaying 73 - 96 of 525 verified sightings
Observation date: Jun 11, 2002
Submitted by: legacy.reporter (Paul Thompson)
Region: Lander County, Nevada, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Dec 01, 2012
Observation date: Jul 18, 1989
Submitted by: legacy.reporter (George T. Austin)
Region: White Pine County, Nevada, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Dec 01, 2012
Observation date: Jul 17, 1996
Submitted by: legacy.reporter (John B. Vernon)
Region: Elko County, Nevada, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Dec 01, 2012
Observation date: Jul 21, 1999
Submitted by: legacy.reporter (Robert L. Langston)
Region: Elko County, Nevada, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Dec 01, 2012
Observation date: Jun 08, 2012
Submitted by: carrie.munill
Region: Baker County, Oregon, United States
Verified by: danaross
Verified date: Jun 19, 2012
Observation date: May 06, 2012
Submitted by: plex1ppus
Region: Lincoln County, Washington, United States
Verified by: davidwdroppers
Verified date: May 07, 2012
Observation date: Jun 13, 1978
Submitted by: legacy.reporter (George T. Austin)
Region: Mineral County, Nevada, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Jan 01, 2012
Observation date: Jul 03, 1980
Submitted by: legacy.reporter (Oakley Shields)
Region: Churchill County, Nevada, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Jan 01, 2012
Observation date: Jul 17, 1996
Submitted by: legacy.reporter (John B. Vernon)
Region: Elko County, Nevada, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Jan 01, 2012
Observation date: Jul 07, 1978
Submitted by: legacy.reporter (George T. Austin)
Region: Elko County, Nevada, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Jan 01, 2012
Observation date: Jul 04, 1980
Submitted by: legacy.reporter (Oakley Shields)
Region: Elko County, Nevada, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Jan 01, 2012
Observation date: Jul 01, 1976
Submitted by: legacy.reporter (Oakley Shields)
Region: Douglas County, Nevada, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Jan 01, 2012
Observation date: Aug 08, 1978
Submitted by: legacy.reporter (George T. Austin)
Region: Eureka County, Nevada, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Jan 01, 2012
Observation date: Jun 22, 1996
Submitted by: legacy.reporter (Robert L. Langston)
Region: Elko County, Nevada, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Jan 01, 2012
Observation date: Jul 26, 2008
Submitted by: RaisingButterfl...
Region: Nevada, United States
Verified by: BAMONA
Verified date: Nov 28, 2011
Observation date: Aug 10, 2011
Submitted by: Tommie Rogers
Region: Elko County, Nevada, United States
Verified by: Ken Davenport
Verified date: Sep 29, 2011
Observation date: Jun 26, 2011
Submitted by: davidwdroppers
Region: Chelan County, Washington, United States
Verified by: davidwdroppers
Verified date: Jun 29, 2011
Observation date: Jun 04, 2011
Submitted by: plex1ppus
Region: Whitman County, Washington, United States
Verified by: davidwdroppers
Verified date: Jun 13, 2011
Observation date: Apr 13, 2007
Submitted by: legacy.reporter (Kojiro Shiraiwa)
Region: San Diego County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: May 01, 2011
Observation date: Apr 11, 2011
Submitted by: Ken Davenport (Ken Davenport)
Region: Kern County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: May 01, 2011
Observation date: Apr 27, 2004
Submitted by: legacy.reporter (William Bouton)
Region: Kern County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: May 01, 2011
Observation date: Jun 27, 1970
Submitted by: legacy.reporter (unknown)
Region: Los Angeles County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: May 01, 2011
Observation date: Jun 12, 2010
Submitted by: plex1ppus (plex1ppus)
Region: Spokane County, Washington, United States
Verified by: davidwdroppers
Verified date: Feb 05, 2011
Observation date: Jul 22, 1969
Submitted by: legacy.reporter (Emmel & Shields)
Region: Elko County, Nevada, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Jan 01, 2011
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