Upperside is light yellow-gray. Males perch and patrol all day on bunchgrass-covered slopes.
Caterpillars probably hibernate in their fourth stage.
One brood from May-June. Virgin prairie, dry bunchgrass hills. Canadian prairie provinces east to southern Manitoba. Isolated populations along the Rocky Mountains in Colorado, New Mexico, and Arizona. G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.