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
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Verified Sightings
Displaying 1 - 24 of 500 verified sightings
Observation date: Jun 18, 2018
Submitted by: Mark Salvato
Region: Jackson County, Oregon, United States
Verified by: Ken Davenport
Verified date: Oct 19, 2021
Observation date: Jun 15, 2018
Submitted by: Mark Salvato
Region: Jackson County, Oregon, United States
Verified by: Ken Davenport
Verified date: Oct 19, 2021
Observation date: Jun 02, 2019
Submitted by: jrmbutterfly
Region: British Columbia, Canada
Verified by: davidwdroppers
Verified date: Aug 31, 2021
Observation date: Jun 03, 2021
Submitted by: Jay Brasher
Region: Keweenaw County, Michigan, United States
Verified by: rosslayberry
Verified date: Aug 09, 2021
Observation date: Jun 08, 2021
Submitted by: stevecary
Region: Routt County, Colorado, United States
Verified by: mikefisher
Verified date: Jul 23, 2021
Observation date: Jul 09, 2021
Submitted by: twofried
Region: Taos County, New Mexico, United States
Verified by: stevecary
Verified date: Jul 11, 2021
Observation date: Jun 09, 2021
Submitted by: twofried
Region: Taos County, New Mexico, United States
Verified by: stevecary
Verified date: Jun 29, 2021
Observation date: Jun 09, 2021
Submitted by: Harry Forbes
Region: Taos County, New Mexico, United States
Verified by: stevecary
Verified date: Jun 29, 2021
Observation date: Apr 18, 2021
Submitted by: Birder2
Region: Sherman County, Oregon, United States
Verified by: Ken Davenport
Verified date: Apr 18, 2021
Observation date: Apr 06, 2021
Submitted by: sonrisa42
Region: Monterey County, California, United States
Verified by: Ken Davenport
Verified date: Apr 08, 2021
Observation date: Jun 12, 2017
Submitted by: lincolnkgray
Region: Klamath County, Oregon, United States
Verified by: davidwdroppers
Verified date: Mar 28, 2021
Observation date: Jun 04, 2019
Submitted by: DVL
Region: Teton County, Wyoming, United States
Verified by: J_Martineau
Verified date: Mar 27, 2021
Observation date: Mar 22, 2021
Submitted by: Selwyn Quan
Region: Santa Clara County, California, United States
Verified by: Ken Davenport
Verified date: Mar 23, 2021
Observation date: Jun 12, 2020
Submitted by: WYbutterflyer1
Region: Albany County, Wyoming, United States
Verified by: J_Martineau
Verified date: Feb 01, 2021
Observation date: Jun 02, 2019
Submitted by: Dwaine Wagoner
Region: Natrona County, Wyoming, United States
Verified by: J_Martineau
Verified date: Jan 25, 2021
Observation date: Jun 25, 2020
Submitted by: dbrudin
Region: Teller County, Colorado, United States
Verified by: mikefisher
Verified date: Oct 25, 2020
Observation date: May 02, 2020
Submitted by: Will Anderson
Region: Natrona County, Wyoming, United States
Verified by: J_Martineau
Verified date: Oct 12, 2020
Observation date: May 29, 2020
Submitted by: A_baldini
Region: Larimer County, Colorado, United States
Verified by: A_baldini
Verified date: Jun 06, 2020
Observation date: May 15, 2020
Submitted by: dlister
Region: San Juan County, Washington, United States
Verified by: davidwdroppers
Verified date: May 19, 2020
Observation date: Apr 18, 2020
Submitted by: alicecas
Region: Contra Costa County, California, United States
Verified by: Ken Davenport
Verified date: Apr 19, 2020
Observation date: Mar 31, 2020
Submitted by: alicecas
Region: Contra Costa County, California, United States
Verified by: Ken Davenport
Verified date: Mar 31, 2020
Observation date: May 17, 2018
Submitted by: jrtindall
Region: Davis County, Utah, United States
Verified by: RaisingButterfl...
Verified date: Feb 02, 2020
Observation date: May 12, 2019
Submitted by: harveyboys
Region: Morgan County, Utah, United States
Verified by: RaisingButterfl...
Verified date: Feb 02, 2020
Observation date: Jun 28, 2019
Submitted by: stevecary
Region: New Mexico, United States
Verified by: stevecary
Verified date: Jan 27, 2020
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