Terns

Combination of 1 colour ring and metal ring (c-ring can be either tarsus).

note 1: birds are ringed at the Starnberger See - colony, Bavaria, Germany ;

- used codes are in 1999-2003 : 1 c-ring on right tarsus and 1 steel ring (Radolfzell) on left tarsus.

- used codes are in 2004-2005 : 1 c-ring on left tarsus and 1 steel ring (Radolfzell) on right tarsus.

note 2: birds are ringed at the Ammersee - colony, Bavaria, Germany.

- used rings are in 2003 : 1 c-ring on right tarsus and 1 steel ring (Radolfzell) on left tarsus.

- used rings are in 2004-2005 : 1 c-ring on left tarsus and 1 steel ring (Radolfzell) on right tarsus.