Biennial-flight
Guides
Oeneis chryxus
Chryxus Arctic, brown Arctic
Oeneis chryxus is a subalpine and alpine butterfly species distributed across northern and western North America. The species exhibits a distinctive semivoltine life cycle, with larvae developing over two years and adults emerging in biennial flight patterns. Populations show striking geographic variation in wing coloration, ranging from cream to orange-brown, which functions as camouflage against rocky substrates. The Ivallda Arctic subspecies (O. c. ivallda) occupies the highest elevation butterfly habitat in North America at over 4,400 meters on Mount Whitney.