The “Age” column contains a numeric code for the age class of the bird. Current codes are shown in the first column. Bands from olden days may use letter codes; these are shown in the second column.
| Code | Old code | Meaning |
|---|---|---|
4 | L | Local |
2 | H | Hatching year |
1 | A | After hatching year |
5 | S | Second year |
6 | O | After second year |
7 | Third year | |
8 | After third year | |
0 | U | Indeterminable |
9 | Not attempted |
The age code is followed by up to two how-aged codes. For the interpretation of these codes, see Section 4.7, “How-codes”.