TY - JOUR AU - Dudzik, Krzysztof AU - Ciach, Michał AU - Jankowiak, Łukasz AU - Dobosz, Robert AU - Bielak, Ernest AU - Albrycht, Mateusz PY - 2012/01/01 Y2 - 2024/03/29 TI - Incestuous broods of the Whooper Swan Cygnus cygnus in Poland JF - Ornis Svecica JA - Ornis Svec VL - 22 IS - 1–2 SE - Research Papers DO - 10.34080/os.v22.22592 UR - https://journals.lub.lu.se/os/article/view/22592 SP - 16–18 AB - <p>We describe a rare case of incestuous broods of Whooper Swan <em>Cygnus cygnus</em> in Świętokrzyskie province, Poland. A sibling pair laid eggs and hatched young at the same site in 2010 and in 2011, nine kilometres from their own hatching place. Both broods were unsuccessful; the young died before autumn. We assume that the key factors explaining the inbreeding were the small local population and that Whooper Swans tend to disperse over short distances.</p> ER -