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Sexing Roseate Tern? 如何分辨粉紅燕鷗的性別?

爸爸來自澳洲? So papa is from Australia?

(攝於 Taken on 27/7/08 刧後餘生 The last Surviving Family in southern waters



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不過這對的尾羽長度卻差不多。
But the different is not that big in this pair

21/6/08 南部水域 Southern Waters

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