Here the birds also find bushes for secreting themselves from predators and some berry bushes for food. Man turned many of the beaches into condos, parking lots and malls. Upon their return north the same construction meets the birds in their normal habitat. In the northern countries like the United States, man is constructing new housing. Lumber jacks have cut some forests into fragments.
Some forests become fragmented and in some cases completely gone.
When fragmented wood lots are near human populations the house cat, raccoons, foxes and hawks prowl along the edges of these diminished wood lands. The song bird become part of the predator's menu. One of the worst enemies of song birds are people's kitty cats. These house cats roam outside during the day and the cats hunt song birds until they return home. Developers can include woodland preservation when building.