As we have continued to make a lot of progress on our tree removals this winter we find more evidence to show that some of these trees are "at risk" trees. You can see in these photos the cracking and cavities that are present. There is no doubt that is has been a wise choice to remove these trees proactively.
In this photo to the left you can see all the rotten wood that surrounds the cavity. These trees can be very unpredictable especially if they are softer wooded trees. Another element that comes into play is the size of the tree. Once trees get large they are impacted by the elements (wind, lightning, rain) to a greater degree. They also become quite heavy. I would compare this to putting a backpack on that is loaded down. If you are not strong enough to handle the extra weight it will effect your stability much more. Obviously this is a slow process and at what point in the thinning of the trees trunk will failure occur, I don't know. I have not heard of a definitive way to predict trees failure in this instance.
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