Unsilvered Fritillary
Speyeria adiaste (W.H. Edwards, 1864)
Family: Nymphalidae
Subfamily: Heliconiinae
Identification: Upperside of male pale reddish-tan to bright brick red; female larger and paler than male. Dark markings scattered and small except for bold postmedian line. Underside pale yellow to gray. Hindwing spots unsilvered and barely contrasting with background color.
Wing Span: 2 - 2 3/8 inches (5 - 6.1 cm).
Life History: Eggs are laid singly on fallen leaves and twigs near violets. First-stage caterpillars hibernate unfed, feeding on violet leaves in the spring.
Flight: One flight from June-July.
Caterpillar Hosts: Violets including Viola quercetorum.
Adult Food: Flower nectar.
Habitat: Openings in redwood and coniferous forests, oak woodlands, chaparral.
Range: Very local, restricted range in California County north to San Mateo County; east to north Los Angeles County and Kern County.
Conservation: Subspecies atossa is extinct; subspecies adiaste has a limited range and may be in jeopardy; while subspecies clemencei has the most extensive range.
NCGR: G3 - Very rare or local throughout its range or found locally in a restricted range (21 to 100 occurrences). (Threatened throughout its range).
Management Needs: Inventory and monitor subspecies adiaste populations and make conservation assessment.
Comments: NULL
Pollinator Week was June 20-26, 2022!
Butterflies and moths are accidental pollinators of many flowering plants. While most species do not have special structures to carry pollen, they do brush against pollen and transfer it to other flowers.
Did you know? The Eastern Tailed-Blue (Cupido comyntas) flies close to the ground and uses its short proboscis to probe flowers of wild strawberry, white sweet clover, and other low-lying plants.
Verified Sightings
Displaying 25 - 48 of 79 verified sightings
Observation date: Jun 11, 1969
Submitted by: legacy.reporter (James R. Mori)
Region: San Luis Obispo County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Jan 06, 2010
Observation date: Jun 15, 1951
Submitted by: legacy.reporter (Unknown)
Region: San Luis Obispo County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Jan 05, 2010
Observation date: Jun 19, 1997
Submitted by: legacy.reporter (Jeffrey Glassberg)
Region: Monterey County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Jan 05, 2010
Observation date: Jul 04, 1975
Submitted by: legacy.reporter (Jim Brock)
Region: San Luis Obispo County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Jan 04, 2010
Observation date: Jun 30, 1922
Submitted by: legacy.reporter (Victor Clemence)
Region: San Luis Obispo County, California, United States
Verified by: legacy.verifier (J. A. Comstock)
Verified date: Jan 04, 2010
Observation date: unknown
Submitted by: legacy.reporter (unknown)
Region: Los Angeles County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Dec 17, 2009
Observation date: Jun 24, 1964
Submitted by: legacy.reporter (unknown)
Region: Monterey County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Dec 17, 2009
Observation date: May 28, 1947
Submitted by: legacy.reporter (C. H. Dickenson)
Region: Monterey County, California, United States
Verified by: legacy.verifier (Emmel & Emmel)
Verified date: Dec 16, 2009
Observation date: Jun 13, 1922
Submitted by: legacy.reporter (J. A. Comstock)
Region: Kern County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Dec 16, 2009
Observation date: Jun 01, 1934
Submitted by: legacy.reporter (Oscar Sette)
Region: Kern County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Dec 16, 2009
Observation date: Jun 25, 1930
Submitted by: legacy.reporter (Ringe & C. Henne)
Region: Kern County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Dec 16, 2009
Observation date: Jul 10, 1932
Submitted by: legacy.reporter (Chris Henne)
Region: Kern County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Dec 16, 2009
Observation date: Jun 25, 1984
Submitted by: Ken Davenport (Ken Davenport)
Region: Santa Cruz County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Dec 16, 2009
Observation date: Jul 09, 1918
Submitted by: legacy.reporter (J. A. Comstock)
Region: Kern County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Dec 16, 2009
Observation date: Aug 12, 1923
Submitted by: legacy.reporter (J. D. Gunder)
Region: Kern County, California, United States
Verified by: legacy.verifier (J. A Comstock)
Verified date: Dec 16, 2009
Observation date: Sep 06, 1930
Submitted by: legacy.reporter (No name on label)
Region: Kern County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Dec 16, 2009
Observation date: Jun 13, 1922
Submitted by: legacy.reporter (J. A. Comstock)
Region: Los Angeles County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Dec 16, 2009
Observation date: Jun 23, 1990
Submitted by: Ken Davenport (Ken Davenport)
Region: Monterey County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Dec 16, 2009
Observation date: Jul 17, 1933
Submitted by: legacy.reporter (L. M. Martin)
Region: Kern County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Dec 16, 2009
Observation date: Jun 25, 1932
Submitted by: legacy.reporter (J. A. Corcoran)
Region: Kern County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Dec 16, 2009
Observation date: Sep 03, 1930
Submitted by: legacy.reporter (Chris Henne)
Region: Kern County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Dec 16, 2009
Observation date: Jul 23, 1932
Submitted by: legacy.reporter (L.M. Martin)
Region: Kern County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Dec 16, 2009
Observation date: Jun 21, 1923
Submitted by: legacy.reporter (J. A. Comstock)
Region: Kern County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Dec 16, 2009
Observation date: Jun 29, 1934
Submitted by: legacy.reporter (Oscar Sette)
Region: Kern County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Dec 16, 2009
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