Giant Sulphur
Colias gigantea Strecker, 1900
Family: Pieridae
Subfamily: Coliadinae
Identification: Upper surface of male yellow with narrow black borders; lower surface without submarginal black spots. Female with 2 forms, yellow or white; both may have black border reduced or lacking.
Wing Span: 2 - 2 3/4 inches (5.1 - 7 cm).
Life History: Third-stage caterpillars overwinter.
Flight: One flight from June-July.
Caterpillar Hosts: Dwarf willow (Salix reticulata).
Adult Food: Flower nectar.
Habitat: Willow bogs.
Range: Alaska south along Rocky Mountains to Wyoming.
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: Not reported.
Comments: NULL
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Verified Sightings
Displaying 1 - 24 of 35 verified sightings
Observation date: Jul 22, 2023
Submitted by: NikkiM
Region: Park County, Wyoming, United States
Verified by: J_Martineau
Verified date: Aug 11, 2023
Observation date: Jul 15, 2023
Submitted by: Thom Garrett
Region: Missoula County, Montana, United States
Verified by: J_Martineau
Verified date: Aug 07, 2023
Observation date: Aug 02, 2021
Submitted by: NikkiM
Region: Sublette County, Wyoming, United States
Verified by: J_Martineau
Verified date: Feb 14, 2023
Observation date: Aug 04, 2021
Submitted by: NikkiM
Region: Park County, Wyoming, United States
Verified by: J_Martineau
Verified date: Oct 21, 2022
Observation date: Aug 04, 2021
Submitted by: bjones7777
Region: Fremont County, Wyoming, United States
Verified by: J_Martineau
Verified date: Sep 08, 2021
Observation date: Jul 12, 2021
Submitted by: mongoose
Region: Glacier County, Montana, United States
Verified by: J_Martineau
Verified date: Sep 08, 2021
Observation date: Jul 25, 2007
Submitted by: Jay Cossey
Region: Manitoba, Canada
Verified by: chalicerae
Verified date: Jun 17, 2020
Observation date: Jul 05, 2018
Submitted by: Paul Prappas
Region: Alberta, Canada
Verified by: Norbert Kondla
Verified date: Nov 24, 2018
Observation date: Jul 24, 2012
Submitted by: HHowell
Region: Alaska, United States
Verified by: Norbert Kondla
Verified date: Nov 24, 2018
Observation date: Jun 19, 2016
Submitted by: Rick Sinnott
Region: Kenai Peninsula, Alaska, United States
Verified by: Norbert Kondla
Verified date: Apr 29, 2017
Observation date: Jul 05, 1981
Submitted by: legacy.reporter (Doug Mullins)
Region: Carbon County, Montana, United States
Verified by: stevekohler (Steve Kohler)
Verified date: Jan 29, 2008
Observation date: Jun 21, 1995
Submitted by: legacy.reporter (F/P)
Region: Northwest Arctic, Alaska, United States
Verified by: legacy.verifier (Lepidopterists' Society Season Summary)
Verified date: Jan 23, 2008
Observation date: unknown
Submitted by: legacy.reporter
Region: Park County, Montana, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Sublette County, Wyoming, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Blaine County, Idaho, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Glacier County, Montana, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Yellowstone National Park County, Wyoming, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Lake County, Montana, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Park County, Wyoming, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Latah County, Idaho, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Powell County, Montana, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Beaverhead County, Montana, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Fremont County, Wyoming, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
Observation date: unknown
Submitted by: legacy.reporter
Region: Lake County, Minnesota, United States
Verified by: legacy.verifier
Verified date: Dec 31, 2004
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