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.
• 长见识了,还真是雌鸟嘴巴长。我们这里整天嗡嗡飞过类似第二只鸟花色的,从来不知都是雌鸟还是雌雄都有 -苏家小灶- ♀ (0 bytes) () 08/25/2023 postreply 16:58:39
• 人也差不多,或者是舌头更长 -移花接木- ♂ (167 bytes) () 08/25/2023 postreply 17:36:54
• 據説婦人舌頭較長。開個玩笑,女性群友和讀者不要見怪。 ;-) -平心之论- ♂ (0 bytes) () 08/25/2023 postreply 20:40:45
• 蜂鳥有很多亞種。美國東部幾乎全是這種Ruby-throated。看内容鏈接。 -平心之论- ♂ (59 bytes) () 08/25/2023 postreply 20:46:24
• 好多都在decreasing, 触目惊心。有种丑的在increqsing,我家树上看到的,好像就是这种黑黑的 -kirn- ♀ (0 bytes) () 08/26/2023 postreply 07:35:39