Papestra biren (Goeze, 1781)

Host plants:
The larvae are polyphagous, but feed often on Vaccinium.

Habitat:
Papestra biren inhabits light, wet woodlands and mountain forests. The moth also occurs above the timber line in dwarf shrub belts.

Life cycle:
The pupa hibernates. The moths fly from May to July. I found caterpillars between mid-July until late August. After hibernation the adults emerge relatively quickly (e.g. 15 days at 19 degrees centigrade).

Endangerment factors:
Papestra biren is locally endangered mainly outside the Alps by the leveling of herb-rich wet forests due to dense forestation.

Remarks:
The distribution is Holarctic: from the Pyrenees across Europe to Japan and also in North America.