No-one comes tricking or treating here, we are Swiss and there is no halloween, but tricks can occur. Was this a caged bird trying to fly away? No – the sun was shining through my window and I have a bird shape stuck on the window. I like clean windows and the bird prevents accidents of people walking into them. The black vertical lines are from my curtain stripes – it was all a trick reflections of the sun shining through the window.