Bird Banding Manual Glossary ADDITIONAL INFORMATION -S A code
describing conditions existing when a bird is banded that may
affect the chance of survival or of subsequent reports of the
bird. See alsoSTATUS. Go to Status and Additional Information
Codes AGE (OR YEAR) CLASS - Alpha and numeric calendar year ages
for birds. See Figure 5-4 for specific designations and
definitions. Go to Current Age Codes Use of the following age
designations was discontinued by the Bird Banding Laboratory on
July 1, 1967: - NESTLING: A bird incapable of sustained flight.
See "L" in current age codes. - IMMATURE: A young bird capable
of sustained flight known to have hatched during the same
calendar year in which it was banded. See "HY" in current age
codes. - SUB-ADULT: A bird known to have hatched in the year
preceding the year of banding. See "SY" in current age codes. -
ADULT: A bird known to have hatched at least two years before
the calendar year of banding. Sub-adults of some species cannot
be distinguished from adults, s