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Species Page - Colias meadii
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scientific name    Colias meadii    

common name     Mead's Sulphur

Lush subalpine and alpine meadows.

One brood, the flight peaking between early July to early August.

The only other Alberta Colias with a dorsal orange colour that extends all the way to the forewing base is the Canada Sulphur (C. canadensis). The Canada Sulphur, however, has the pink outline of the underside discal spot smeared outwards, and is a brighter orange (not burnt-orange). Our populations are subspecies elis.
D. Macaulay image

life history
A description of the immature stages is summarized by Guppy & Shepard (2001). The yellow-green eggs are conical in shape. The mature larvae are dark yellowish-green and covered in short black hairs, with a yellow subdorsal and white lateral line. The pupae are yellow green with a dark dorsal line. It is possible that this species overwinters twice before reaching maturity.

Not of concern.

diet info
The larval host plants are not known in Canada. in Wyoming and Colorado, subspecies meadii feeds on legumes such as Astragalus and Trifolium (Guppy & Shepard 2001). There are no published reports of adult nectar sources.

There are several discontinuous populations of Mead's Sulphur from Tumbler Ridge, BC south to Colorado and extreme northern New Mexico (Layberry et al. 1998, Opler 1999). It occurs primarily in the front ranges of the Rockies.

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Related Species Info
Display Hierarchy
References (3)
Specimen Info
There are 4 specimens of this species in the online database
Map Distribution
Adult Seasonal Distributioncreate a collection histogram with specimens
Specimen List (4)


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