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 514 verified sightings
Observation date: Jun 09, 2022
Submitted by: Pheasantboy77
Region: Gallatin County, Montana, United States
Verified by: stevekohler
Verified date: Jan 18, 2023
Observation date: Jun 18, 2019
Submitted by: Liz Osborn
Region: British Columbia, Canada
Verified by: Paul Prappas
Verified date: Sep 16, 2022
Observation date: Jun 22, 2019
Submitted by: Liz Osborn
Region: British Columbia, Canada
Verified by: Paul Prappas
Verified date: Sep 16, 2022
Observation date: Jun 13, 2019
Submitted by: Claire Christensen
Region: British Columbia, Canada
Verified by: Paul Prappas
Verified date: Sep 14, 2022
Observation date: Jul 09, 2022
Submitted by: tjay13
Region: Rio Arriba County, New Mexico, United States
Verified by: stevecary
Verified date: Sep 09, 2022
Observation date: Jun 04, 2021
Submitted by: Paul Prappas
Region: British Columbia, Canada
Verified by: Paul Prappas
Verified date: Sep 07, 2022
Observation date: Jun 17, 2020
Submitted by: Paul Prappas
Region: British Columbia, Canada
Verified by: Paul Prappas
Verified date: Sep 07, 2022
Observation date: Jun 29, 2022
Submitted by: twofried
Region: Taos County, New Mexico, United States
Verified by: stevecary
Verified date: Jul 17, 2022
Observation date: Jun 22, 2022
Submitted by: Cascade Colors
Region: Park County, Colorado, United States
Verified by: mikefisher
Verified date: Jul 06, 2022
Observation date: Jun 02, 2022
Submitted by: Cascade Colors
Region: Jefferson County, Colorado, United States
Verified by: mikefisher
Verified date: Jun 29, 2022
Observation date: Jun 02, 2022
Submitted by: Cascade Colors
Region: Jefferson County, Colorado, United States
Verified by: mikefisher
Verified date: Jun 28, 2022
Observation date: May 28, 2022
Submitted by: pnesterenko
Region: El Paso County, Colorado, United States
Verified by: mikefisher
Verified date: Jun 27, 2022
Observation date: Apr 02, 2022
Submitted by: icosahedron
Region: Santa Clara County, California, United States
Verified by: Ken Davenport
Verified date: Apr 03, 2022
Observation date: May 21, 2017
Submitted by: yhelfman
Region: San Mateo County, California, United States
Verified by: Ken Davenport
Verified date: Mar 30, 2022
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
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