I didn't see the rainbow at the time, only when I looked at the picture on the computer. It was really the sunset light on the trees that made me get the camera out.
Once upon a time my friend Bee told me about 'project 365' in which you take a photo a day for a year. I wasn't that disciplined about it and it took me one year and 3 months to reach Day 365, but it quickly became a habit of sorts and also a record of my year. So I've overrun but I continue with it anyway!