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4.6. Age group

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.

CodeOld codeMeaning
4LLocal
2HHatching year
1AAfter hatching year
5SSecond year
6OAfter second year
7 Third year
8 After third year
0UIndeterminable
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”.