All have well-established populations, but none are native species. . . . To control large-scale urban bird problems, it is necessary to understand population control as a management technique. In good habitats abundant animal species recover quickly from the loss of individuals.
Animal populations respond with increased birth and survival rates and decreased emigration.
These are known as compensatory responses . Increased immigration may follow removals , and some animals learn to avoid control efforts. The most effective way to control problem birds is to understand their daily requirements, and remove or exclude these. This kind of manipulation for purposes of increasing or decreasing numbers is an important part of wildlife management. Some basic principles provide a background for understanding how to control problem birds effectively and appropriately.