Parhelion, or Sundog

Wandering around looking for a nice Autumnal blip, I looked up and spotted this, so I gave up on "Autumnal". It is a parhelion, otherwise known as a sundog - looking like a kind of vertical rainbow. These can occur on either side of the sun at the same time, but today there wasn't one visible on the other side. The sun in the image is to the left of the trees and is quite low. Sundogs used to be quite a rare sight, but we see them quite often, usually fairly late in the day, and at all times of the year.