rather common species in Belgium.
larva lives in a black pistol-case on Quercus.
The final case has a silken cape covering the pistol-case almost
completely which make the case look like a bird-dropping. It hibernates
and later pupates in the case fixed in a sunny position on the upper
surface of a leaf.
adults fly in one generation a year; onwards from late July towards August. They come to light.
Namur, Lavaux Ste.-Anne, 11 May 2007.
final case on Quercus (Photo © Chris Steeman)