Photo is a bit blurry but it looks like English ivy. In the open, ground ivy can cover acres or climb tall trees, but it is easily kept small in a container or by hard trimming. There are many varieties differing in size, leaf shape or color. The distinction of “adult” refers to a ground cover ivy that has matured and climbed, producing berries (which the birds eat and spread the plant.) The classic ivy shape of the leaf often morphs into a shape that is not commonly recognized. Be careful pulling it off trees and structures. Those hairs that hold the plant in place, will take what it is holding onto with it. The best approach in removing climbing ivy is to cut it back at the base, and wait for the plant to die back before removing, should you wish to control it.