Eventually, the bird reaches adulthood and develops the distinctive plumage, behavior, and other traits of its species. Adult birds are typically able to mate and reproduce, and may migrate to different areas depending on the season or other factors. In old age, the bird may experience declines in health and reproductive capacity, and may eventually die. The exact lifespan of a bird varies depending on the species and other factors, but can range from a few years to several decades.
