These codes are used to record how the bander determined age or sex.
S | Skull ossification. |
C | Cloacal protuberance. |
B | Brood patch. |
J | Juvenal plumage. |
L | Molt limit. |
P | Plumage. |
M | Molt. |
F | Feather wear. |
I | Mouth or bill. |
E | Eye color. |
W | Wing length. |
T | Tail length. |
O | Other. A note is required on the back of the sheet when this code is used. The compiler does not enforce this requirement. |