Red ring with white code (Hxxx) and (Helgoland) metal ring (on other leg), allways “H” at beginning.
Dr. Sönke Martens, Carl Gördelerweg 16, D-25524 Itzehoe, Germany.
e-mail : S.Martens@KH-Itzehoe.de
Note 1 : xxx stands for numbers and letters.
Note 2 : examples are H99X, H123, HA67, HX43, H789, H23A
Note 3 : rings are to be read from bottom to top, most rings have a “checkpoint”.
Note 4 : birds are ringed at Schleswig- Holstein.
Note 5 : some rings are used at Lesser Black-backed Gulls, see this species.
