Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Bird ringing or bird banding is a technique used in the study of wild birds, by attaching a small, individually numbered, metal or plastic tag to their legs or wings, so that various aspects of the bird''s life can be studied by the ability to re-find the same individual later. This can include migration, longevity, mortality, population studies, territoriality, feeding behaviour, and other aspects that are studied by ornithologists. Bird ringing is the term used in the UK and in some other parts of Europe; elsewhere it is known as bird banding, as the shape of the tag is more band-like than ring-like. Organised ringing efforts are called ringing or banding schemes, and the organisations that run them are ringing or banding authorities. (Birds are ringed rather than rung.) Those who ring or band birds are known as ringers or banders, and they are typically active at ringing or banding stations.