Osprey Pandion haliaetus chicks accepted by foster parents at a lake in Pennsylvania, USA

  • Published source details Rymon L. (1990) Osprey nestlings fostered by hacked adults two weeks after predation of their young. Journal of Raptor Research, 24, 71-72


This study is summarised as evidence for the following.

Action Category

Foster eggs or chicks of raptors with wild conspecifics

Action Link
Bird Conservation
  1. Foster eggs or chicks of raptors with wild conspecifics

    A small study at a lake in Pennsylvania, USA, in 1988 (Rymon 1990), found that two osprey Pandion halieatus chicks were successfully adopted by a breeding pair that had lost their two chicks to predation. The foster chicks were 5.5 weeks old and were placed in the nest two weeks after the original young were last seen and were accepted later that day. No information is provided on fledging or subsequent survival but the author notes that “the nestlings were fed well and protected by their foster parents throughout the nesting period”.


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