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 241 - 264 of 525 verified sightings
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Observation date: Feb 28, 2002
Submitted by: Ken Davenport (Ken Davenport)
Region: Tulare County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Oct 15, 2009
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Observation date: Apr 26, 1979
Submitted by: Ken Davenport (Ken Davenport)
Region: Kern County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Oct 15, 2009
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Observation date: Jun 21, 2006
Submitted by: Ken Davenport (Ken Davenport)
Region: Mono County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Oct 15, 2009
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Observation date: Jul 03, 2005
Submitted by: Ken Davenport (Ken Davenport)
Region: Tulare County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Oct 15, 2009
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Observation date: Jun 11, 1993
Submitted by: Ken Davenport (Ken Davenport)
Region: Madera County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Oct 15, 2009
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Observation date: Aug 09, 1998
Submitted by: Ken Davenport (Ken Davenport)
Region: Mono County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Oct 15, 2009
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Observation date: Jun 23, 2006
Submitted by: Ken Davenport (Ken Davenport)
Region: Inyo County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Oct 15, 2009
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Observation date: Apr 24, 2004
Submitted by: Ken Davenport (Ken Davenport)
Region: Santa Barbara County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Oct 15, 2009
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Observation date: Apr 03, 1977
Submitted by: Ken Davenport (Ken Davenport)
Region: Kern County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Oct 15, 2009
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Observation date: May 07, 2006
Submitted by: Ken Davenport (Ken Davenport)
Region: Kern County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Oct 15, 2009
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Observation date: Apr 13, 1994
Submitted by: Ken Davenport (Ken Davenport)
Region: Tulare County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Oct 15, 2009
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Observation date: Apr 23, 1995
Submitted by: Ken Davenport (Ken Davenport)
Region: Kern County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Oct 15, 2009
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Observation date: May 16, 2009
Submitted by: davidwdroppers (David Droppers)
Region: Chelan County, Washington, United States
Verified by: davidwdroppers (David Droppers)
Verified date: Aug 21, 2009
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Observation date: May 16, 2009
Submitted by: davidwdroppers (David Droppers)
Region: Chelan County, Washington, United States
Verified by: davidwdroppers (David Droppers)
Verified date: Aug 21, 2009
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Observation date: Jul 11, 2009
Submitted by: Ken Davenport (Ken Davenport)
Region: Mono County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Aug 10, 2009
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Observation date: May 25, 2009
Submitted by: Ken Davenport (Ken Davenport)
Region: Inyo County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Jun 11, 2009
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Observation date: May 10, 2009
Submitted by: Ken Davenport (Ken Davenport)
Region: Kern County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: May 18, 2009
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Observation date: May 10, 2009
Submitted by: Ken Davenport (Ken Davenport)
Region: Ventura County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: May 18, 2009
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Observation date: May 09, 2009
Submitted by: Ken Davenport (Ken Davenport)
Region: Santa Barbara County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: May 18, 2009
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Observation date: May 09, 2009
Submitted by: Ken Davenport (Ken Davenport)
Region: Santa Barbara County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: May 18, 2009
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Observation date: Apr 26, 2009
Submitted by: Ken Davenport (Ken Davenport)
Region: Kern County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: May 18, 2009
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Observation date: Jun 26, 2004
Submitted by: legacy.reporter (Will Kerling)
Region: Park County, Montana, United States
Verified by: stevekohler (Steve Kohler)
Verified date: Jan 29, 2008
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Observation date: Jul 02, 1982
Submitted by: Norbert Kondla (Norbert Kondla)
Region: Phillips County, Montana, United States
Verified by: legacy.verifier (Norbert Kondla)
Verified date: Jan 29, 2008
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Observation date: Jun 23, 2005
Submitted by: stevekohler (Steve Kohler)
Region: Jefferson County, Montana, United States
Verified by: stevekohler (Steve Kohler)
Verified date: Jan 29, 2008
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