I'm sure there is some statistical analysis that can be done to predict whether a leaf will fall from its petiole, 20 metres to the ground, to land and become part of the photographer's image or be swiftly carried along by the stream which is fast-flowing and narrow, wide and slow in places, to flow towards the sea.
Or indeed to be thrown on to a rock and deposited there as higher water recedes.
The green moss here vibrant from recent wet weather, the same precipitation that feeds the stream and helps to bring those dried leaves to the ground.
And it's a scenic sight, reds and greens saturating this small corner of the Irish countryside.
The challenge on this morning was to keep the camera dry, but amazingly the afternoon turned to bright sunshine and all with a warm breeze.
Autumn is a time of colour of course, so woodlands and the mountains take on a stereotypical burst of colour as green moves to yellow, brown and red.
Time to enjoy photographing the pockets of deciduous woodland that dot the Irish landscape.
Join Panoramic Ireland in 2021 to photograph scenic Irish waterfalls and landscapes.
Here, an ancient Irish woodland: https://panoramicireland.com/photo-tours-blog/116-ancient-woodland-co-kerry-ireland