What a surprise!

This butterfly was on the window sill in the lanundry room today. Its wings were open when I went into the room, but closed over after I got my camera.

I have no idea where it came from. If it has been in the room for some time, you would think I would have seen the chrysalis and then the caterpillar before it became a butterfly. I will need to have a good clean out to see if there are more.