|On the window. She's missing two left legs.|
|On a glass box full of shells.|
I hadn't noticed before; look at the wings. She doesn't just flap them; they also rotate. In the top photo, the leading edge, the one with the stiff ribs, is towards the back. On the box, it's now towards the front.
|On a glass bottle. Leading rib is towards the front again.|
And then I took pity on her and let her rest. In the morning, she had moved on.
(I know she's female because of the old-fashioned pen nib tip to her abdomen, the ovipositor.)