Arborists specialize in the care and preservation of individual trees. Hiring an arborist is a decision that should not be taken lightly. Proper tree care is an investment that can lead to substantial returns as maintained trees will add a very mature and attractive look to a property. Poorly maintained and hazardous trees that are not addressed can be a significant liability. Pruning or removing trees, especially at heights, can be dangerous work. Tree work should be done by those that have proper equipment and training.