Tree surgery is a large feature in the cultivation, management and study of trees, shrubs and other plants. This means that it is a professional practice within arboriculture. Arborists do not work with forests or large areas of plants, but continually focus on the health of individual trees and plants. More specifically, a tree surgeon is a horticultural engineer who is responsible for the maintenance and repair of trees. This often includes the climbing of trees to reach the area that needs attention.