Pruning a tree by using a professional tree climber and an ISA Certified Arborist is healthier for our trees, and creates a safer situation for people. A climber can access parts of the tree that a bucket truck or man-lift cannot. A climber can access the inner branches that open up a tree to sunlight and air movement. Bucket trucks will often leave a “lion-tail” look by taking off all the foliage of the tree that they can reach with their truck. This leaves a tree long/lengthy and top-heavy. These trees are hazardous and will break in our Colorado snow-loads and wind-loads.