Sylvan Hairstreak
Satyrium sylvinus (Boisduval, 1852)
Family: Lycaenidae
Subfamily: Theclinae
Identification: With or without tails. Upperside gray-brown or reddish with blue sheen; hindwing with small orange patch at lower edge. Female with yellowish tinge. Underside pale gray to white. Postmarginal band of small black dots; some individuals may have only a few spots. Yellow to red spot at hindwing lower edge.
Wing Span: 1 - 1 3/8 inches (2.5 - 3.5 cm).
Life History: Males perch on low vegetation near host plants to watch for females. Eggs are laid singly on stems of host plants where they hibernate until spring. Caterpillars feed on leaves.
Flight: One flight from May-August.
Caterpillar Hosts: Various willow (Salix) species.
Adult Food: Nectar from flowers including milkweed and Indian hemp.
Habitat: Willow thickets, open woodlands, streams, oases.
Range: British Columbia southeast to Wyoming, Colorado, New Mexico; south through California to Baja California Norte.
Conservation: Not usually required.
NCGR: G4 - Apparently secure globally, though it might be quite rare in parts of its range, especially at the periphery.
Management Needs: None reported.
Comments: NULL
Alternate Scientific Names:
Satyrium sylvinum
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Verified Sightings
Displaying 145 - 168 of 574 verified sightings
Observation date: Jul 16, 1996
Submitted by: legacy.reporter (John B. Vernon)
Region: Pershing County, Nevada, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Dec 01, 2012
Observation date: Aug 08, 1994
Submitted by: legacy.reporter (Ray & Kit Stanford)
Region: Maricopa County, Arizona, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Dec 01, 2012
Observation date: Jul 30, 2012
Submitted by: plex1ppus
Region: Missoula County, Montana, United States
Verified by: stevekohler
Verified date: Sep 17, 2012
Observation date: Aug 05, 2012
Submitted by: PDunwiddie
Region: Skamania County, Washington, United States
Verified by: davidwdroppers
Verified date: Aug 14, 2012
Observation date: May 16, 2012
Submitted by: Alison Davies
Region: San Diego County, California, United States
Verified by: Ken Davenport
Verified date: May 17, 2012
Observation date: Jul 27, 1977
Submitted by: legacy.reporter (Michael Smith)
Region: Washoe County, Nevada, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Jan 01, 2012
Observation date: Jul 16, 1996
Submitted by: legacy.reporter (John B. Vernon)
Region: Pershing County, Nevada, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Jan 01, 2012
Observation date: Aug 05, 2011
Submitted by: legacy.reporter (Ken Kertell)
Region: White Pine County, Nevada, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Jan 01, 2012
Observation date: Jul 04, 1976
Submitted by: legacy.reporter (R. H. Leuschener)
Region: Lyon County, Nevada, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Jan 01, 2012
Observation date: Jul 18, 1996
Submitted by: legacy.reporter (Robert L. Langston)
Region: Pershing County, Nevada, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Jan 01, 2012
Observation date: Jul 04, 1976
Submitted by: legacy.reporter (R. H. Leuschener)
Region: Washoe County, Nevada, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Jan 01, 2012
Observation date: Jun 02, 2012
Submitted by: Ken Davenport (Ken Davenport)
Region: Kern County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Jan 01, 2012
Observation date: Jul 23, 1996
Submitted by: legacy.reporter (Robert L. Langston)
Region: Pershing County, Nevada, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Jan 01, 2012
Observation date: Aug 18, 2011
Submitted by: plex1ppus
Region: Spokane County, Washington, United States
Verified by: davidwdroppers
Verified date: Aug 25, 2011
Observation date: Jul 11, 2011
Submitted by: Alison Davies
Region: San Diego County, California, United States
Verified by: Ken Davenport
Verified date: Jul 15, 2011
Observation date: Jul 14, 2007
Submitted by: legacy.reporter (William Bouton)
Region: Plumas County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: May 01, 2011
Observation date: Jul 02, 1979
Submitted by: legacy.reporter (unknown)
Region: Ventura County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: May 01, 2011
Observation date: Jul 12, 2007
Submitted by: legacy.reporter (William Bouton)
Region: Alpine County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: May 01, 2011
Observation date: Jun 23, 2009
Submitted by: legacy.reporter (Stephen Myers)
Region: Los Angeles County, California, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: May 01, 2011
Observation date: Jul 25, 2009
Submitted by: plex1ppus (plex1ppus)
Region: Pend Oreille County, Washington, United States
Verified by: davidwdroppers
Verified date: Mar 13, 2011
Observation date: Jul 03, 2010
Submitted by: stevecary
Region: Santa Fe County, New Mexico, United States
Verified by: stevecary
Verified date: Jan 25, 2011
Observation date: Jul 09, 1993
Submitted by: Ken Davenport (Ken Davenport)
Region: Yavapai County, Arizona, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Jan 01, 2011
Observation date: Jul 24, 2011
Submitted by: Ken Davenport (Ken Davenport)
Region: Yavapai County, Arizona, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Jan 01, 2011
Observation date: Jul 04, 1984
Submitted by: Ken Davenport (Ken Davenport)
Region: Coconino County, Arizona, United States
Verified by: Ken Davenport (Ken Davenport)
Verified date: Jan 01, 2011
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