Attributes of Glaucopsyche piasus

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.
Taxonomy Notes:

Images of Glaucopsyche piasus

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Glaucopsyche piasus - glaucopsyche_piasus_daunia_caterpillar4a_raisingbutterflies.jpg

Glaucopsyche piasus - glaucopsyche_piasus_daunia_caterpillar4a_raisingbutterflies.jpg
Glaucopsyche piasus - glaucopsyche_piasus_daunia_caterpillar4b_raisingbutterflies.jpg

Glaucopsyche piasus - glaucopsyche_piasus_daunia_caterpillar4b_raisingbutterflies.jpg
Glaucopsyche piasus - 3820_54.jpg

Glaucopsyche piasus - 3820_54.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
May 14, 2016 bobscafe British Columbia, Canada June 01, 2016 Details
April 05, 2016 MAKI Ventura County, California, United States April 07, 2016 Details
June 22, 2015 J_Martineau Teton County, Wyoming, United States December 10, 2015 Details
June 03, 2012 mcash70 British Columbia, Canada October 19, 2015 Details
May 31, 2012 carlakish Coconino County, Arizona, United States February 06, 2015 Details
May 19, 2012 diwalks2 San Diego County, California, United States January 28, 2014 Details
June 09, 2013 HHowell Teton County, Wyoming, United States July 12, 2013 Details
June 08, 2013 Nancy Lea Sandy Natrona County, Wyoming, United States June 12, 2013 Details
July 04, 2004 tjantscher Carbon County, Wyoming, United States January 10, 2013 Details
July 09, 1982 legacy.reporter (K Hansen-S. Mattoon) Lander County, Nevada, United States December 01, 2012 Details
July 18, 1989 legacy.reporter (George T. Austin) White Pine County, Nevada, United States December 01, 2012 Details
July 19, 1995 legacy.reporter (Robert L. Langston) Humboldt County, Nevada, United States December 01, 2012 Details
June 22, 1996 legacy.reporter (Robert L. Langston) Elko County, Nevada, United States December 01, 2012 Details
July 17, 1996 legacy.reporter (John B. Vernon) Elko County, Nevada, United States December 01, 2012 Details
June 11, 1997 legacy.reporter (Ray Stanford) Storey County, Nevada, United States December 01, 2012 Details
June 09, 1997 legacy.reporter (J. Vernon-R. Langston) Humboldt County, Nevada, United States December 01, 2012 Details
July 21, 1999 legacy.reporter (Robert L. Langston) Elko County, Nevada, United States December 01, 2012 Details
June 04, 2002 legacy.reporter (Paul Thompson) Lander County, Nevada, United States December 01, 2012 Details
June 11, 2002 legacy.reporter (Paul Thompson) Lander County, Nevada, United States December 01, 2012 Details
June 12, 2002 legacy.reporter (Paul Thompson) White Pine County, Nevada, United States December 01, 2012 Details
June 08, 2012 carrie.munill Baker County, Oregon, United States June 19, 2012 Details
May 06, 2012 plex1ppus Lincoln County, Washington, United States May 07, 2012 Details
June 22, 1996 legacy.reporter (Robert L. Langston) Elko County, Nevada, United States January 01, 2012 Details
July 17, 1996 legacy.reporter (John B. Vernon) Elko County, Nevada, United States January 01, 2012 Details
July 01, 1976 legacy.reporter (Oakley Shields) Douglas County, Nevada, United States January 01, 2012 Details
June 13, 1978 legacy.reporter (George T. Austin) Mineral County, Nevada, United States January 01, 2012 Details
July 07, 1978 legacy.reporter (George T. Austin) Elko County, Nevada, United States January 01, 2012 Details
August 08, 1978 legacy.reporter (George T. Austin) Eureka County, Nevada, United States January 01, 2012 Details
July 03, 1980 legacy.reporter (Oakley Shields) Churchill County, Nevada, United States January 01, 2012 Details
July 04, 1980 legacy.reporter (Oakley Shields) Elko County, Nevada, United States January 01, 2012 Details
July 26, 2008 RaisingButterflies.org Nevada, United States November 28, 2011 Details
August 10, 2011 Tommie Rogers Elko County, Nevada, United States September 29, 2011 Details
June 26, 2011 davidwdroppers Chelan County, Washington, United States June 29, 2011 Details
June 04, 2011 plex1ppus Whitman County, Washington, United States June 13, 2011 Details
June 27, 1970 legacy.reporter (unknown) Los Angeles County, California, United States May 01, 2011 Details
April 13, 2007 legacy.reporter (Kojiro Shiraiwa) San Diego County, California, United States May 01, 2011 Details
April 27, 2004 legacy.reporter (William Bouton) Kern County, California, United States May 01, 2011 Details
April 11, 2011 Ken Davenport (Ken Davenport) Kern County, California, United States May 01, 2011 Details
June 12, 2010 plex1ppus (plex1ppus) Spokane County, Washington, United States February 05, 2011 Details
July 01, 1967 legacy.reporter (John Lane) Elko County, Nevada, United States January 01, 2011 Details
July 09, 1969 legacy.reporter (Callaghan) Elko County, Nevada, United States January 01, 2011 Details
July 22, 1969 legacy.reporter (Emmel & Shields) Elko County, Nevada, United States January 01, 2011 Details
July 26, 1979 legacy.reporter (Emmel & Shields) Elko County, Nevada, United States January 01, 2011 Details
June 26, 1972 legacy.reporter (Robert L. Langston) Elko County, Nevada, United States January 01, 2011 Details
June 15, 1974 legacy.reporter (Kilian Roever) Coconino County, Arizona, United States January 01, 2011 Details
July 16, 2010 legacy.reporter (Paul Opler and EviBuckner-Opler ) Madison County, Montana, United States December 31, 2010 Details
July 16, 2010 legacy.reporter (Paul Opler and EviBuckner-Opler ) Madison County, Montana, United States December 31, 2010 Details
July 07, 2010 legacy.reporter (Paul Opler and EviBuckner-Opler ) Deschutes County, Oregon, United States December 31, 2010 Details
July 11, 2010 legacy.reporter (Paul Opler and EviBuckner-Opler ) Deschutes County, Oregon, United States December 31, 2010 Details
May 07, 2010 Ken Davenport (Ken Davenport) Tulare County, California, United States December 31, 2010 Details