A bird known to have hatched at least two years before the calendar year of banding. Since 1988 a four-letter code for common names has replaced the use of common names on banding schedules. A marking device other than the standard metal leg band. Includes colored neck and leg bands, paints, dyes, leg or wing flags or streamers, tags, nasal discs, and radio transmitters. On bands smaller than size 2, the legend is stamped on the inside of the band.
Older bands have different legends.
Each band used in the North American Bird Banding Program carries a unique serial number. On smaller bands the prefix is usually stamped above the suffix. Hummingbird bands have a single letter that represents the prefix. The last 5 digits of the band number after the separation or dash. The percentage of banded birds shot and retrieved by hunters that are reported to the Bird Banding Laboratory.