Queen Alexandra’s Sulphur, Colias alexandra <LEP36>)
A sulphur of the Rocky Mountains and surrounding areas. The very bright yellow wings of the male
are set off by sharp black margins.
The female is a paler shade of yellow, and has only a bit of charcoal
dusting around the forewing tips. Underneath, this butterfly is colored a cool green. It perches on a host plant, the golden
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