Oeneis norna, the Norse grayling, is a species of butterfly in the subfamily Satyrinae, that occurs throughout Scandinavia and the northern Palearctic.
Description
It is extremely variable, and the smaller, lighter O. norna often resemble O. bore. ==Range and habitat==
There is one flight a year between mid-June and July. It takes two seasonal cycles for the caterpillars to completely develop. Once the caterpillars hatch many will die without even attempting to eat. Host plants • Phleum pratense • Poa alpina • Carex species • Nardus species ==References==