Besides moths at night, there are some really odd critters that appear on the windows.
Neuroptera: Mantispidae: Climaciella brunnea - Wasp Mantidfly
Mantispidae, known commonly as mantidflies, mantispids, mantid lacewings or mantis-flies, is a family of small to moderate-sized insects in the order Neuroptera. There are many genera with around 400 species worldwide, especially in the tropics and subtropics. Only 5 species of Mantispa occur in Europe.