Not often I get to see the underneath of a moth.
This one was on the outside of the bathroom window.
The surrounding patterns are formed by the window glass.
I went outside to try to photo a top view but, alas, it flew away.
All I got was a brief glimpse of chestnut brown wings each with a white spot.
Many thanks to Ragged Robin for identifying this as a Vapourer Moth.
2 hours ago