Rails and Coots

Combination of c-rings :
* 1 or 2 c-rings and metal ring (till 2014)
OR
* 3 c-rings and metal ring (on left leg, but 3 birds on right leg) (from 2014 onwards)
OR
* 1 c-ring over metal ring (on one leg) and 2 c-rings (on other leg) (from 2015 onwards). 

note 1 : for the third possibility, the c-ring (over the metal ring) is red or black during 2015, dark-blue during 2016, yellow for 2017, ...   

note 2 : used colours are : white, black, orange, red, pistache (lime), green, blue and yellow.

note 3 : do note the side of the rings as this is important. 

note 4 : birds are ringed at the Bois de Vincennes, near Paris, France.

note 5 :