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S21?

The color ring combination located on the right leg is Red-orange-red. We can see the  satellite tracking sensor on its back. SO this bird should be S21
Great find! Can you submit the record to our online system? http://bfs.hkbws.org.hk/

右腳上的顏色環為紅橙紅, 同時可見其背上有用作衛星追蹤儀器,牠應該就是今個冬天留在香港過冬的S21
很好的發現, 你可以把這個紀錄加進我們的黑臉琵鷺紀錄系統嗎? http://bfs.hkbws.org.hk/
香港觀鳥會 HKBWS

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