Dryas octopetala
There is just one generation per year. The eggs are laid individually. The larvae have been recorded on "Alchemilla glomerulans", Alpine lady's mantle ("Alchemilla alpina"), mountain avens ("Dryas octopetala") and several species of cinqefoils ("Potentilla"). The caterpillars spin a silken web and anchor leaves together to make a shelter in which they congregate. They hibernate over winter and pupate in a similar shelter the following spring.