Large Marble
Euchloe ausonides (Lucas, 1852)
Family: Pieridae
Subfamily: Pierinae
Identification: Scattered white scales in forewing black bar. Black pattern on tip of upperside of forewing. Dense green marbling on underside of hindwing.
Wing Span: 1 1/2 - 2 inches (3.8 - 5.1 cm).
Life History: Males patrol valleys and hillsides for females. Eggs are laid singly on unopened flower buds; caterpillars eat flowers and fruits. Chrysalids hibernate.
Flight: One in the north, May-July; two in central California, February-April and May-August.
Caterpillar Hosts: Plants of the mustard (Brassicaceae) family including rockcress (Arabis drummondi), dyer's woad (Isatis tinctoria), mustards (Brassica species), and hedge mustard (Sisymbrium species).
Adult Food: Nectar from flowers of the mustard family and other plants such as fiddleneck (Amsinckia) and brodiaeas.
Habitat: Valleys, hillsides, fields, meadows, and other open sunny areas.
Range: Alaska south to central California and northern New Mexico, east to southwest Manitoba.
Conservation: The Island Marble (Euchloe ausonides insulanus) is critically imperiled. It was thought to be extinct but has been rediscovered on San Juan Island (Washington). Conservation efforts focus on restoring its ecosystem - the Puget Sound lowland prairie.
NCGR: G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery. Subspocies insulanus is T1 (Critically Imperiled).
Management Needs: None needed.
Comments: NULL
Verified Sightings
Displaying 1 - 24 of 456 verified sightings
Observation date: May 27, 2018
Submitted by: PDunwiddie
Region: Kittitas County, Washington, United States
Verified by: davidwdroppers
Verified date: May 29, 2018
Observation date: May 05, 2018
Submitted by: Chris Carvalho
Region: Klickitat County, Washington, United States
Verified by: davidwdroppers
Verified date: May 27, 2018
Observation date: Jun 11, 2016
Submitted by: Tim Shortell
Region: Gunnison County, Colorado, United States
Verified by: A_baldini
Verified date: Dec 30, 2017
Observation date: May 20, 2017
Submitted by: frogbandit
Region: Anchorage, Alaska, United States
Verified by: Norbert Kondla
Verified date: Sep 23, 2017
Observation date: Jun 02, 2017
Submitted by: frogbandit
Region: Anchorage, Alaska, United States
Verified by: Norbert Kondla
Verified date: Sep 23, 2017
Observation date: May 10, 2017
Submitted by: Rick Sinnott
Region: Anchorage, Alaska, United States
Verified by: Norbert Kondla
Verified date: Sep 23, 2017
Observation date: Jun 10, 2017
Submitted by: Mapper
Region: Boulder County, Colorado, United States
Verified by: mikefisher
Verified date: Jul 27, 2017
Observation date: May 14, 2017
Submitted by: A_baldini
Region: Larimer County, Colorado, United States
Verified by: mikefisher
Verified date: Jul 23, 2017
Observation date: Apr 25, 2017
Submitted by: jetboulder@aol.com
Region: Boulder County, Colorado, United States
Verified by: mikefisher
Verified date: Jul 22, 2017
Observation date: May 14, 2017
Submitted by: Sue Orlowski
Region: Lincoln County, Washington, United States
Verified by: davidwdroppers
Verified date: May 25, 2017
Observation date: May 17, 2017
Submitted by: PDunwiddie
Region: San Juan County, Washington, United States
Verified by: davidwdroppers
Verified date: May 24, 2017
Observation date: May 16, 2017
Submitted by: Featherstone Academy
Region: Santa Clara County, California, United States
Verified by: Ken Davenport
Verified date: May 24, 2017
Observation date: May 09, 2017
Submitted by: Chris Carvalho
Region: Klickitat County, Washington, United States
Verified by: davidwdroppers
Verified date: May 13, 2017
Observation date: Jun 13, 2016
Submitted by: ncrosbyrd
Region: Tulare County, California, United States
Verified by: Ken Davenport
Verified date: Jul 21, 2016
Observation date: Jun 28, 2016
Submitted by: jetboulder@aol.com
Region: Chaffee County, Colorado, United States
Verified by: mikefisher
Verified date: Jul 16, 2016
Observation date: May 08, 2016
Submitted by: jetboulder@aol.com
Region: Boulder County, Colorado, United States
Verified by: mikefisher
Verified date: Jun 19, 2016
Observation date: May 20, 2016
Submitted by: Sue Orlowski
Region: Lincoln County, Washington, United States
Verified by: davidwdroppers
Verified date: Jun 11, 2016
Observation date: May 13, 2016
Submitted by: janazak
Region: Yukon Territory, Canada
Verified by: davidwdroppers
Verified date: May 15, 2016
Observation date: Apr 12, 2016
Submitted by: PDunwiddie
Region: Grant County, Washington, United States
Verified by: davidwdroppers
Verified date: Apr 14, 2016
Observation date: Jul 12, 2015
Submitted by: ColoradEO
Region: Gilpin County, Colorado, United States
Verified by: azukoff
Verified date: Mar 02, 2016
Observation date: Jun 18, 2015
Submitted by: bobscafe
Region: British Columbia, Canada
Verified by: Norbert Kondla
Verified date: Feb 11, 2016
Observation date: Jun 01, 2011
Submitted by: Charlene Burge
Region: Plumas County, California, United States
Verified by: CA Ivy
Verified date: Jan 14, 2016
Observation date: Jul 12, 2015
Submitted by: ncrosbyrd
Region: Gunnison County, Colorado, United States
Verified by: mikefisher
Verified date: Sep 20, 2015
Observation date: Jun 18, 2015
Submitted by: ncrosbyrd
Region: Gunnison County, Colorado, United States
Verified by: mikefisher
Verified date: Sep 16, 2015
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