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Terns 燕鷗
» 粉紅、普通及黑枕燕鷗羽色 Roseate, Common and Black-naped Terns
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粉紅、普通及黑枕燕鷗羽色 Roseate, Common and Black-naped Terns
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Post at 1/09/2013 22:02
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粉紅、普通及黑枕燕鷗羽色 Roseate, Common and Black-naped Terns
1/9/13
香港南部水域 HK Southern waters
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Last edited by BWA at 9/09/2013 05:00
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Post at 3/09/2013 22:39
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Quote:
Original posted by
wkcheng
at 2/09/2013 21:20
還以為有些是普通燕鷗呢!
請問怎樣分辨呢?
多謝提醒!
參考了多本圖鑑,得出以下結論,不肯定是否正確:
頭全黑,嘴和腳鮮紅色的當然是粉紅燕鷗
頭全黑,嘴黑,腳黑或黑中帶紅的是普通燕鷗
頭不全黑,上體帶黑斑的是粉紅燕鷗幼鳥
頭頂全黑,上體沒有黑斑,額及嘴前有白色的是普通燕鷗冬羽(圖一正中)
頭頂白色的是黑枕燕鷗
圖二左上角黑枕燕鷗旁邊的是黑枕幼鳥
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Post at 8/09/2013 23:11
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其實這群燕鷗毛色非常相近,不太肯定如何分辨。
例如這三隻,
1 號紅嘴紅腳,尾羽比收起來的飛羽長得多,是粉紅燕鷗。
2 號黑嘴黑腳,尾羽比收起來的飛羽長了一點點,相信是普通燕鷗。
3 號嘴黑中帶微紅,嘴黑中帶紅,尾羽和 2 號差不多,相信也是普通燕鷗。
有些圖鑑說普通燕鷗毛色較粉紅燕鷗偏灰,在這裡看不出。
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Post at 8/09/2013 23:15
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這一隻和上圖 3 號最相似,算是普通燕鷗。
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Post at 8/09/2013 23:17
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1 號又是普通燕鷗
2 號額前有白色,應是普通燕鷗冬羽
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Post at 8/09/2013 23:20
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1 號和 3 號腳都比較鮮紅,
和粉紅燕鷗差不多,尾羽也不短,
而粉紅燕鷗非繁殖期嘴會變黑,
因此有點懷疑牠們會不會是粉紅燕鷗。
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Post at 8/09/2013 23:29
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3 號和 4 號都是粉紅燕鷗,
2 號的腳紅色和牠們很相近,
只是覆羽稍稍偏灰,
是大的分別只在嘴,
不過粉紅燕鷗非繁殖期也有黑嘴,
2 號有沒有可能是粉紅燕鷗呢?
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Post at 14/09/2013 20:24
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相信是。
沒有聽過本港有普通燕鷗幼鳥的紀錄。
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