| Citation | Thyen, S. and P.H. Becker, 2006 Effects of individual life-history traits and weather on reproductive output of black-headed gulls Larus ridibundus breeding in the Wadden Sea, 1991-97. Bird Study 53:132-141. |
| Ref. | 101508 Thyen, S. and P.H. Becker, 2006 |
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| Named Used as Valid | Larus ridibundus |
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