Pink-edged Sulphur
Colias interior Scudder, 1862
Family: Pieridae
Subfamily: Coliadinae
Identification: Both sexes with conspicuous pink wing edges. Male yellow; female yellow or white (very rarely). Upperside of male with black border; border on female may be incomplete or only seen at tip of wing. Underside of hindwing clear yellow with single silver cell spot circled in pink.
Wing Span: 1 1/2 - 2 5/8 inches (3.9 - 6.6 cm).
Life History: Males patrol with a slow flight for females. Eggs are laid in midsummer on blueberry leaves, and young caterpillars overwinter. Most feeding occurs the following spring.
Flight: One flight from June-August.
Caterpillar Hosts: Various blueberry plants (Vaccinium species) in the heath family (Ericaceae).
Adult Food: Nectar from flowers of bristly sarsaparilla and orange hawkweed.
Habitat: Shrubby openings in woods, bogs, or scrub areas where Ericaceae grows; often in burned or logged sites.
Range: From British Columbia and eastern Oregon east through the Great Lakes area to northern New England. Isolated population in central Appalachians of northeast Pennsylvania, western Maryland, eastern West Virginia, and northwest Virginia.
Conservation: Mountain populations of southern Appalachians should be monitored.
NCGR: G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.
Management Needs: Investigate habitat management needs,if any, in southern Appalachian habitats.
Comments: NULL
Verified Sightings
Displaying 1 - 24 of 311 verified sightings
Observation date: Aug 01, 2009
Submitted by: NikkiM
Region: Montana, United States
Verified by: J_Martineau
Verified date: Mar 27, 2021
Observation date: Jul 21, 2020
Submitted by: gasigr
Region: Wallowa County, Oregon, United States
Verified by: Ken Davenport
Verified date: Mar 16, 2021
Observation date: Sep 03, 2011
Submitted by: NikkiM
Region: Wyoming, United States
Verified by: J_Martineau
Verified date: Mar 14, 2021
Observation date: Jul 15, 2012
Submitted by: NikkiM
Region: Judith Basin County, Montana, United States
Verified by: J_Martineau
Verified date: Mar 12, 2021
Observation date: Jul 23, 2017
Submitted by: NikkiM
Region: Carbon County, Montana, United States
Verified by: J_Martineau
Verified date: Mar 11, 2021
Observation date: Jul 04, 2015
Submitted by: BarbSendelbach
Region: Franklin County, New York, United States
Verified by: rosslayberry
Verified date: Mar 08, 2021
Observation date: Sep 04, 2019
Submitted by: Ian Pepper
Region: Essex County, Massachusetts, United States
Verified by: jwileyrains
Verified date: Jan 11, 2021
Observation date: Jul 14, 2020
Submitted by: John Terpstra
Region: Ontario, Canada
Verified by: rosslayberry
Verified date: Aug 17, 2020
Observation date: Jul 22, 2020
Submitted by: dsperanza
Region: Montana, United States
Verified by: J_Martineau
Verified date: Jul 27, 2020
Observation date: Jul 15, 2020
Submitted by: Tom Dudones
Region: Franklin County, New York, United States
Verified by: rosslayberry
Verified date: Jul 19, 2020
Observation date: Jul 15, 2020
Submitted by: Tom Dudones
Region: Franklin County, New York, United States
Verified by: rosslayberry
Verified date: Jul 19, 2020
Observation date: Jul 14, 2005
Submitted by: Tom Dudones
Region: Franklin County, New York, United States
Verified by: rosslayberry
Verified date: Jul 09, 2020
Observation date: Jul 02, 2020
Submitted by: Tom Dudones
Region: Essex County, New York, United States
Verified by: rosslayberry
Verified date: Jul 02, 2020
Observation date: Jun 27, 2020
Submitted by: Benjamin Miller
Region: Crawford County, Michigan, United States
Verified by: rosslayberry
Verified date: Jun 30, 2020
Observation date: Jun 18, 2020
Submitted by: kathybrown
Region: Hancock County, Maine, United States
Verified by: rosslayberry
Verified date: Jun 24, 2020
Observation date: Jun 05, 2020
Submitted by: terrymortier
Region: Burnett County, Wisconsin, United States
Verified by: Tom Middagh
Verified date: Jun 14, 2020
Observation date: Jul 29, 2019
Submitted by: AaronB
Region: Montana, United States
Verified by: J_Martineau
Verified date: Apr 23, 2020
Observation date: Jul 07, 2019
Submitted by: Tom Dudones
Region: Essex County, New York, United States
Verified by: rosslayberry
Verified date: Jan 31, 2020
Observation date: Aug 17, 2019
Submitted by: rob77897@gmail.com
Region: Schoolcraft County, Michigan, United States
Verified by: rosslayberry
Verified date: Jan 18, 2020
Observation date: Jul 07, 2019
Submitted by: plex1ppus
Region: Pend Oreille County, Washington, United States
Verified by: davidwdroppers
Verified date: Nov 15, 2019
Observation date: Aug 24, 2019
Submitted by: tirvine2020
Region: Teton County, Wyoming, United States
Verified by: J_Martineau
Verified date: Oct 22, 2019
Observation date: Aug 23, 2019
Submitted by: Ed Rothwell
Region: Newaygo County, Michigan, United States
Verified by: rosslayberry
Verified date: Sep 20, 2019
Observation date: Jul 20, 2019
Submitted by: ncrosbyrd
Region: Fremont County, Wyoming, United States
Verified by: J_Martineau
Verified date: Aug 29, 2019
Observation date: Jul 04, 2019
Submitted by: acadiaonmymind
Region: Washington County, Maine, United States
Verified by: rosslayberry
Verified date: Aug 11, 2019
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