covert feather
US /ˈkʌvərt ˈfɛðər/
UK /ˈkʌvərt ˈfɛðər/
1.
覆羽
Any of the small feathers covering the bases of the larger flight feathers of a bird's wing or tail.
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The bird's beautiful plumage was highlighted by the iridescent covert feathers.
鸟儿美丽的羽毛被虹彩的覆羽衬托得更加突出。
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Ornithologists often examine the pattern of covert feathers for species identification.
鸟类学家经常检查覆羽的图案以识别物种。