Attributes of Colias eurytheme

Orange Sulphur
Colias eurytheme Boisduval, 1852

Family: Pieridae
Subfamily: Coliadinae
Identification: Quite variable. Upperside of male yellow with orange overlay, yellow veins, wide black border, and dark black cell spot. Female yellow or white with irregular black border surrounding light spots. Underside hindwing spot silver with 2 concentric dark rings, and a spot above it.
Wing Span: 1 3/8 - 2 3/4 inches (3.5 - 7 cm).
Life History: Males patrol for receptive females, who lay eggs singly on top of host plant leaves. Most feeding takes place at night. Young caterpillars chew holes in the tops of leaves, then later feed from the leaf tip. Older caterpillars eat half of the leaf before moving to the other half. Chrysalids overwinter.
Flight: Two-three flights in the north from June-October, 4-5 in the south from March-November.
Caterpillar Hosts: Plants in the pea family (Fabaceae) including alfalfa (Medicago sativa), white clover (Trifolium repens), and white sweet clover (Melilotus alba).
Adult Food: Nectar from many kinds of flowers including dandelion, milkweeds, goldenrods, and asters.
Habitat: A wide variety of open sites, especially clover and alfalfa fields, mowed fields, vacant lots, meadows, road edges.
Range: Southern Canada to central Mexico, coast to coast in the United States except for the Florida peninsula. Comments: One of the most widespread and common butterflies in North America.
Conservation: Not required.
NCGR: G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.
Management Needs: Caterpillars can be very destructive in alfalfa fields.
Taxonomy Notes:

Images of Colias eurytheme

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Colias eurytheme - Colias-eurytheme-ventral-Queener-crop.jpg

Colias eurytheme - Colias-eurytheme-ventral-Queener-crop.jpg
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Colias eurytheme - Colias_eurythemeSanders.jpg

Colias eurytheme - Colias_eurythemeSanders.jpg
Colias eurytheme - TammyKnuth-Colias_eurytheme-crop.jpg

Colias eurytheme - TammyKnuth-Colias_eurytheme-crop.jpg

The map below displays all BAMONA data for this species and has three different data layers:
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There are also three base layers: 1. Satellite    2. Normal   3. Hybrid

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*The orange dots on the map provide access to information about the 400 most recently verified sightings of this species. Sometimes, there are several records at the same location. Use the table view to access these records.

By default, the fifty most recently verified sightings are below. Sort by Observation Date to see the most recent sightings, or filter the sightings by region to get a regional list.

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Observation Date Submitter Region Verified Datesort icon
August 23, 2015 KZelewsky Du Page County, Illinois, United States August 30, 2015 Details
August 18, 2015 bkruse1950 Mason County, Michigan, United States August 29, 2015 Details
August 04, 2015 Happyhealy Hart County, Kentucky, United States August 27, 2015 Details
July 18, 2015 tom nolan Burlington County, New Jersey, United States August 24, 2015 Details
August 16, 2015 Doug Bruce Overton County, Tennessee, United States August 21, 2015 Details
August 15, 2015 Sue Orlowski Lincoln County, Washington, United States August 20, 2015 Details
August 14, 2015 Paul Tavares Ontario, Canada August 19, 2015 Details
August 16, 2015 Chesaloosa Caroline County, Maryland, United States August 18, 2015 Details
August 18, 2015 rdcpics York County, Pennsylvania, United States August 18, 2015 Details
August 09, 2015 South Laurel Laurel County, Kentucky, United States August 15, 2015 Details
August 09, 2015 JRonan17 Herkimer County, New York, United States August 10, 2015 Details
August 09, 2015 JRonan17 Herkimer County, New York, United States August 10, 2015 Details
August 08, 2015 Doug Bruce Lawrence County, Tennessee, United States August 08, 2015 Details
July 02, 2015 Carolyn Seaton Lancaster County, South Carolina, United States August 07, 2015 Details
August 05, 2015 hmclin York County, Pennsylvania, United States August 07, 2015 Details
August 07, 2015 Steven Chatfield Ontario, Canada August 07, 2015 Details
August 02, 2015 Beverly Carter Baxter County, Arkansas, United States August 04, 2015 Details
August 02, 2015 Melinda Fawver Sumner County, Tennessee, United States August 04, 2015 Details
August 02, 2015 Doug Bruce Robertson County, Tennessee, United States August 04, 2015 Details
August 04, 2015 ButterBelle Putnam County, Tennessee, United States August 04, 2015 Details
July 27, 2015 Nigel T.W.Taylor Inyo County, California, United States August 03, 2015 Details
August 01, 2015 Doug Bruce Montgomery County, Tennessee, United States August 02, 2015 Details
August 01, 2015 CA Ivy Washington County, Arkansas, United States August 02, 2015 Details
August 02, 2015 stephen stedman Trousdale County, Tennessee, United States August 02, 2015 Details
August 16, 2014 LibbyMegna Goshen County, Wyoming, United States July 27, 2015 Details
July 25, 2015 Doug Bruce Marshall County, Tennessee, United States July 27, 2015 Details
June 06, 2015 Ron Smith Pinellas County, Florida, United States July 26, 2015 Details
July 18, 2015 gunhilda Payne County, Oklahoma, United States July 26, 2015 Details
July 04, 2015 leptolover84 Humboldt County, California, United States July 25, 2015 Details
July 16, 2015 CA Ivy Washington County, Arkansas, United States July 20, 2015 Details
July 23, 2010 mellielong Lincoln County, West Virginia, United States July 19, 2015 Details
June 25, 2012 mellielong Lincoln County, West Virginia, United States July 19, 2015 Details
July 18, 2015 stephen stedman Clay County, Tennessee, United States July 19, 2015 Details
July 14, 2015 2mama2 Lancaster County, Pennsylvania, United States July 17, 2015 Details
July 15, 2015 Homegardener3816 Fairfax County, Virginia, United States July 17, 2015 Details
July 16, 2015 cycad97 Kern County, California, United States July 17, 2015 Details
July 11, 2015 Donna Barski Wyoming County, New York, United States July 14, 2015 Details
July 11, 2015 stephen stedman Smith County, Tennessee, United States July 11, 2015 Details
June 13, 2015 tom nolan Burlington County, New Jersey, United States July 09, 2015 Details
July 07, 2015 Hereugo Delaware County, Pennsylvania, United States July 09, 2015 Details
July 09, 2015 Beverly Carter Baxter County, Arkansas, United States July 09, 2015 Details
August 21, 2014 monikawood Steuben County, New York, United States July 08, 2015 Details
July 05, 2015 Jarchibold Orange County, New York, United States July 07, 2015 Details
July 03, 2015 Marvin Smith Searcy County, Arkansas, United States July 05, 2015 Details
July 01, 2015 gpstewart Texas, United States, Williamson County July 02, 2015 Details
June 29, 2015 Gardens by Renata Jelito Queens County, New York, United States June 30, 2015 Details
June 28, 2015 John LeBlanc Madison County, Virginia, United States June 29, 2015 Details
June 28, 2015 roseanna Casey County, Kentucky, United States June 28, 2015 Details
April 01, 2012 Joe Saunders Mercer County, West Virginia, United States June 25, 2015 Details
June 20, 2015 AnnL Todd County, Minnesota, United States June 22, 2015 Details