The next fields describe “micro-aging” by means of molt limits and other criteria. The practice has changed over the years:
The first six fields and the last field have always been recorded.
Prior to the 2004 field season, there were ten
micro-aging fields. Following the first six were
three fields named
UNP were recorded,
but these fields do not conform to current models of
Starting in the 2004 field season, those three fields
were replaced by a single field named
BPL, for a total of eight micro-aging fields.
Values allowed in these fields since 2004 are:
|Juvenal and formative|
|Juvenal and basic|
Any micro-aging field can also be blank.
This table shows the micro-aging fields. The first column is the label on the actual banding sheet. The second column is the name of the field in the dBASE V layout; see Section 5, “The current MAPS/MAWS output format” for field descriptions. The third column is “all” if taken in all years, “old” if taken before 2004, and “new” if taken from 2004 on.
|Pri. Covs.||all||Primary coverts.|
|Sec. Covs.||all||Secondary coverts.|
|Body plum.||new||Body plumage.|