Trimming trees is a potentially hazardous activity that's best left to professionals, especially because it can also have an adverse effect on any animals who might be living in said tree.
Take the case of this squirrel for instance. As landscapers were trimming the branches off of some palm trees, they accidentally knocked down her nest with three of her babies still inside. Not wanting to hurt the babies, they managed to safely bring the nest to the ground, but they weren't sure what to do with it after that.
That's when the mama came onto the scene and did just what any good mother would do. She took her babies to safety, and though she had to build a new nest, at least her family is nice and safe.