The birds of this project have a colour ring with a 3 character inscription on one upper leg and may have a coloured flag without inscription on the other upper leg.
The color code consists of the descriptions of the colour ring. If the bird has a flag the colour code and the flag code are separated by a slash ("/"):
colour ring (3 elements)
flag (2 letters)
Example W-A10/Gf. This bird has a white ring with inscription A10 on the left upper leg and a green flag without inscription on the right upper leg.
colour-letters