Chlosyne palla Boisduval 1852

The Peace River population is endemic and distinct from mountain populations.

One yearly flight, peak activity between late June and late July.

Central BC and southern Alberta south to Colorado and California (Scott 1986). There is a disjunct population in the Peace River grasslands of Alberta / BC (Layberry et al. 1998).

"The upperside exhibits the typical checkerspot pattern of orange and brown-black, with a checkered orange-red and cream underside. Superficially similar to the Euphydryas checkerspots, but distinguished by the absence of cream-white spots on the upperside. More difficult to separate from the Rockslide Checkerspot (C. damoetas), which has a slightly duller, dingier look to it, with fewer dark markings on the forewing top. Damoetas is found only above treeline in rockslides and boulder fields, Northern Checkerspots rarely wander up this high.