Last modified: May 28, 2021, 9:54 a.m.
A fairly common species in Belgium, widely distributed.
Greyish white skin; the former 6–7 abdominal segments reddish-brown; head black, thoracic plates darb brown.
8–10 mm, constructed from 4 to 6 crescent-like plant particles.
Details about the oviposition and the early larval stages are still unknown. Cases found during autumn containing less than five crescents contain caterpillars that will hibernate and will continue feeding for a second year. Cases with five or sex crescents contain fully-grown larvae that will hibernate in the larval stage and pupate in springtime without further feeding.
The adult moths are active in late afternoon sunshine and at dusk. They come to light.
The adults fly in one generation a year from mid-May till mid-July.
Mixed forests or pure pine forests with mainly Abies alba or Picea abies, mainly in cool habitats.