https://www.rubythroat.org/HummerMeasureMain.html
The exposed bill in a typical male Ruby-throated Hummingbird averages 15mm-18mm, while females measure 17mm-21mm.
https://www.rubythroat.org/HummerMeasureMain.html
The exposed bill in a typical male Ruby-throated Hummingbird averages 15mm-18mm, while females measure 17mm-21mm.
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長見識了,還真是雌鳥嘴巴長。我們這裏整天嗡嗡飛過類似第二隻鳥花色的,從來不知都是雌鳥還是雌雄都有
-蘇家小灶-
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08/25/2023 postreply
16:58:39
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人也差不多,或者是舌頭更長
-移花接木-
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08/25/2023 postreply
17:36:54
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據説婦人舌頭較長。開個玩笑,女性群友和讀者不要見怪。 ;-)
-平心之論-
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08/25/2023 postreply
20:40:45
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蜂鳥有很多亞種。美國東部幾乎全是這種Ruby-throated。看內容鏈接。
-平心之論-
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08/25/2023 postreply
20:46:24
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好多都在decreasing, 觸目驚心。有種醜的在increqsing,我家樹上看到的,好像就是這種黑黑的
-kirn-
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08/26/2023 postreply
07:35:39
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