Also, in all of these photos, you cannot see "hanging" alula or primary coverts often shown by Rook.
同时,所有的照片都看不到『悬挂起』的小
羽或大覆羽,通常秃鼻鸦会有这
。
Also, in all of these photos, you cannot see "hanging" alula or primary coverts often shown by Rook.
同时,所有的照片都看不到『悬挂起』的小
羽或大覆羽,通常秃鼻鸦会有这
。
The team also noted a hinged flap near the base of the wing, called an Alula, which is deployed at right angles to the wing, which may be being used as a air flow-control device.
这小组还注意到,
根附近铰接的副
,
称为小
的,对
成直角配置,它可能
作为空气流量控制装置。
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