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 472 verified sightings
Observation date: Jun 29, 2019
Submitted by: A_baldini
Region: Larimer County, Colorado, United States
Verified by: A_baldini
Verified date: Jul 04, 2019
Observation date: Jun 21, 2019
Submitted by: Scott Burgess
Region: Humboldt County, California, United States
Verified by: Ken Davenport
Verified date: Jun 22, 2019
Observation date: Jun 22, 2018
Submitted by: jim meissner
Region: Oregon, United States
Verified by: Ken Davenport
Verified date: Jun 22, 2019
Observation date: May 12, 2019
Submitted by: dsperanza
Region: Montana, United States
Verified by: J_Martineau
Verified date: May 15, 2019
Observation date: Apr 15, 2019
Submitted by: PKD
Region: Alameda County, California, United States
Verified by: Ken Davenport
Verified date: Apr 19, 2019
Observation date: Apr 17, 2019
Submitted by: Lisahug
Region: Sonoma County, California, United States
Verified by: Ken Davenport
Verified date: Apr 17, 2019
Observation date: Mar 27, 2019
Submitted by: kejwa414
Region: Santa Clara County, California, United States
Verified by: Ken Davenport
Verified date: Mar 28, 2019
Observation date: Jun 02, 2018
Submitted by: sgguthart
Region: Larimer County, Colorado, United States
Verified by: A_baldini
Verified date: Dec 24, 2018
Observation date: May 23, 2018
Submitted by: Claude Rioux
Region: British Columbia, Canada
Verified by: Norbert Kondla
Verified date: Nov 24, 2018
Observation date: Jun 07, 2018
Submitted by: RobertWeeden
Region: Fairbanks North Star, Alaska, United States
Verified by: Norbert Kondla
Verified date: Nov 24, 2018
Observation date: May 22, 2018
Submitted by: sgguthart
Region: Larimer County, Colorado, United States
Verified by: A_baldini
Verified date: Aug 27, 2018
Observation date: Jun 20, 2018
Submitted by: hydapse
Region: Carbon County, Montana, United States
Verified by: J_Martineau
Verified date: Aug 03, 2018
Observation date: Jun 21, 2018
Submitted by: sarabseth
Region: Alameda County, California, United States
Verified by: Ken Davenport
Verified date: Jul 18, 2018
Observation date: May 30, 2018
Submitted by: Jay Brasher
Region: Keweenaw County, Michigan, United States
Verified by: rosslayberry
Verified date: Jul 17, 2018
Observation date: May 26, 2018
Submitted by: Jay Brasher
Region: Keweenaw County, Michigan, United States
Verified by: rosslayberry
Verified date: Jul 09, 2018
Observation date: May 17, 2018
Submitted by: A_baldini
Region: Larimer County, Colorado, United States
Verified by: mikefisher
Verified date: Jun 26, 2018
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
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