Autumn colours

This doesn't really do justice to the tree, but it has turned from green, through red to orange in the last week or so. I've not been aware of such rapid changes before and don't know if it's my lack of awareness, or a particularly quick change of season - because of the weather or even if it's normal.
Retirement has given me the time to notice things like this, and so has generated questions that I would not have asked while I was working. Next year I will try and record the 'speed' of autumn. Blipfoto will tell how successful I am!